mirror of
https://git.sb/baoshuo/OI-codes.git
synced 2024-11-08 14:18:47 +00:00
3669. [Noi2014] 魔法森林
https://hydro.ac/d/bzoj/record/6322e92532ae6c3198cc95fa
This commit is contained in:
parent
c971054ca4
commit
aa464c71a2
237
BZOJ/3669/3669.cpp
Normal file
237
BZOJ/3669/3669.cpp
Normal file
@ -0,0 +1,237 @@
|
||||
#include <iostream>
|
||||
#include <algorithm>
|
||||
#include <limits>
|
||||
#include <stack>
|
||||
|
||||
using std::cin;
|
||||
using std::cout;
|
||||
const char endl = '\n';
|
||||
|
||||
const int N = 50005,
|
||||
M = 1e5 + 5;
|
||||
|
||||
class LinkCutTree {
|
||||
private:
|
||||
struct node {
|
||||
size_t l, r, f;
|
||||
int v, m;
|
||||
unsigned id;
|
||||
bool rev;
|
||||
|
||||
node()
|
||||
: l(0), r(0), f(0), v(0), m(std::numeric_limits<int>::min()), id(0), rev(false) {}
|
||||
|
||||
node(int _v, size_t _f, unsigned _id)
|
||||
: l(0), r(0), f(_f), v(_v), m(_v), id(_id), rev(false) {}
|
||||
|
||||
size_t &child(unsigned x) {
|
||||
return !x ? l : r;
|
||||
}
|
||||
} tr[N + M];
|
||||
|
||||
inline void pushup(size_t u) {
|
||||
tr[u].m = tr[u].v;
|
||||
tr[u].id = u;
|
||||
|
||||
if (tr[u].l && tr[u].m < tr[tr[u].l].m) {
|
||||
tr[u].m = tr[tr[u].l].m;
|
||||
tr[u].id = tr[tr[u].l].id;
|
||||
}
|
||||
|
||||
if (tr[u].r && tr[u].m < tr[tr[u].r].m) {
|
||||
tr[u].m = tr[tr[u].r].m;
|
||||
tr[u].id = tr[tr[u].r].id;
|
||||
}
|
||||
}
|
||||
|
||||
inline void pushdown(const size_t &u) {
|
||||
if (!tr[u].rev) return;
|
||||
|
||||
std::swap(tr[u].l, tr[u].r);
|
||||
tr[tr[u].l].rev = !tr[tr[u].l].rev;
|
||||
tr[tr[u].r].rev = !tr[tr[u].r].rev;
|
||||
tr[u].rev = false;
|
||||
}
|
||||
|
||||
unsigned relation(const size_t &u) {
|
||||
return u == tr[tr[u].f].l ? 0 : 1;
|
||||
}
|
||||
|
||||
bool isRoot(const size_t &u) {
|
||||
return tr[tr[u].f].l != u && tr[tr[u].f].r != u;
|
||||
}
|
||||
|
||||
void rotate(size_t u) {
|
||||
size_t p = tr[u].f;
|
||||
unsigned x = relation(u);
|
||||
|
||||
if (!isRoot(p)) {
|
||||
tr[tr[p].f].child(relation(p)) = u;
|
||||
}
|
||||
tr[u].f = tr[p].f;
|
||||
|
||||
if (tr[u].child(x ^ 1)) {
|
||||
tr[tr[u].child(x ^ 1)].f = p;
|
||||
}
|
||||
tr[p].child(x) = tr[u].child(x ^ 1);
|
||||
|
||||
tr[u].child(x ^ 1) = p;
|
||||
tr[p].f = u;
|
||||
|
||||
pushup(p);
|
||||
pushup(u);
|
||||
}
|
||||
|
||||
void splay(size_t u) {
|
||||
std::stack<size_t> st;
|
||||
|
||||
size_t cur = u;
|
||||
st.push(cur);
|
||||
while (!isRoot(cur)) {
|
||||
st.push(tr[cur].f);
|
||||
cur = tr[cur].f;
|
||||
}
|
||||
|
||||
while (!st.empty()) {
|
||||
pushdown(st.top());
|
||||
st.pop();
|
||||
}
|
||||
|
||||
while (!isRoot(u)) {
|
||||
if (isRoot(tr[u].f)) {
|
||||
rotate(u);
|
||||
} else if (relation(u) == relation(tr[u].f)) {
|
||||
rotate(tr[u].f);
|
||||
rotate(u);
|
||||
} else {
|
||||
rotate(u);
|
||||
rotate(u);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void access(size_t u) {
|
||||
for (size_t f = 0; u; u = tr[f = u].f) {
|
||||
splay(u);
|
||||
tr[u].r = f;
|
||||
pushup(u);
|
||||
}
|
||||
}
|
||||
|
||||
void makeRoot(const size_t &u) {
|
||||
access(u);
|
||||
splay(u);
|
||||
tr[u].rev = !tr[u].rev;
|
||||
}
|
||||
|
||||
size_t findRoot(size_t u) {
|
||||
access(u);
|
||||
splay(u);
|
||||
|
||||
while (tr[u].l) {
|
||||
u = tr[u].l;
|
||||
}
|
||||
|
||||
return u;
|
||||
}
|
||||
|
||||
public:
|
||||
void set(int p, int v) {
|
||||
tr[p].m = tr[p].v = v;
|
||||
}
|
||||
|
||||
int query(int x, int y) {
|
||||
split(x, y);
|
||||
|
||||
return tr[y].m;
|
||||
}
|
||||
|
||||
void split(const size_t &x, const size_t &y) {
|
||||
makeRoot(x);
|
||||
access(y);
|
||||
splay(y);
|
||||
}
|
||||
|
||||
void link(const int &x, const int &y) {
|
||||
makeRoot(x);
|
||||
|
||||
if (findRoot(y) != x) {
|
||||
tr[x].f = y;
|
||||
}
|
||||
}
|
||||
|
||||
void cut(int x, int y) {
|
||||
split(x, y);
|
||||
|
||||
if (tr[y].l == x) {
|
||||
tr[y].l = 0;
|
||||
tr[x].f = 0;
|
||||
}
|
||||
}
|
||||
|
||||
bool isConnected(const int &x, const int &y) {
|
||||
makeRoot(x);
|
||||
|
||||
return x == findRoot(y);
|
||||
}
|
||||
|
||||
const unsigned &id(const int x) {
|
||||
return tr[x].id;
|
||||
}
|
||||
|
||||
const int &max(const int &x) {
|
||||
return tr[x].m;
|
||||
}
|
||||
} lct;
|
||||
|
||||
int n, m, ans = std::numeric_limits<int>::max();
|
||||
|
||||
struct node {
|
||||
int x, y, a, b;
|
||||
} q[M];
|
||||
|
||||
int main() {
|
||||
std::ios::sync_with_stdio(false);
|
||||
cin.tie(nullptr);
|
||||
|
||||
cin >> n >> m;
|
||||
|
||||
for (int i = 1; i <= m; i++) {
|
||||
cin >> q[i].x >> q[i].y >> q[i].a >> q[i].b;
|
||||
}
|
||||
|
||||
std::sort(q + 1, q + m + 1, [](const node &a, const node &b) {
|
||||
return a.a == b.a ? a.b < b.b : a.a < b.a;
|
||||
});
|
||||
|
||||
for (int i = 1; i <= m; i++) {
|
||||
lct.set(i + n, q[i].b);
|
||||
|
||||
if (q[i].x == q[i].y) continue;
|
||||
|
||||
if (lct.isConnected(q[i].x, q[i].y)) {
|
||||
lct.split(q[i].x, q[i].y);
|
||||
|
||||
int x = lct.id(q[i].y), y = lct.max(q[i].y);
|
||||
int a = q[x - n].x, b = q[x - n].y;
|
||||
|
||||
if (y > q[i].b) {
|
||||
lct.cut(a, x);
|
||||
lct.cut(x, b);
|
||||
lct.link(q[i].x, i + n);
|
||||
lct.link(i + n, q[i].y);
|
||||
}
|
||||
} else {
|
||||
lct.link(q[i].x, i + n);
|
||||
lct.link(i + n, q[i].y);
|
||||
}
|
||||
|
||||
if (lct.isConnected(1, n)) {
|
||||
ans = std::min(ans, lct.query(1, n) + q[i].a);
|
||||
}
|
||||
}
|
||||
|
||||
cout << (ans == std::numeric_limits<int>::max() ? -1 : ans) << endl;
|
||||
|
||||
return 0;
|
||||
}
|
BIN
BZOJ/3669/data/1.in
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/1.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/1.out
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/1.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/10.in
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/10.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/10.out
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/10.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/11.in
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/11.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/11.out
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/11.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/12.in
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/12.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/12.out
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/12.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/13.in
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/13.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/13.out
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/13.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/14.in
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/14.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/14.out
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/14.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/15.in
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/15.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/15.out
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/15.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/16.in
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/16.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/16.out
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/16.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/17.in
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/17.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/17.out
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/17.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/18.in
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/18.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/18.out
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/18.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/19.in
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/19.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/19.out
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/19.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/2.in
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/2.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/2.out
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/2.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/20.in
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/20.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/20.out
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/20.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/3.in
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/3.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/3.out
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/3.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/4.in
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/4.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/4.out
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/4.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/5.in
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/5.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/5.out
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/5.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/6.in
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/6.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/6.out
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/6.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/7.in
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/7.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/7.out
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/7.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/8.in
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/8.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/8.out
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/8.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/9.in
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/9.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/3669/data/9.out
(Stored with Git LFS)
Normal file
BIN
BZOJ/3669/data/9.out
(Stored with Git LFS)
Normal file
Binary file not shown.
Loading…
Reference in New Issue
Block a user