mirror of
https://git.sb/baoshuo/OI-codes.git
synced 2024-12-24 03:31:59 +00:00
parent
132ef5c2b5
commit
da50312cc6
167
S2OJ/1810/1810.cpp
Normal file
167
S2OJ/1810/1810.cpp
Normal file
@ -0,0 +1,167 @@
|
||||
#include <iostream>
|
||||
#include <algorithm>
|
||||
#include <iterator>
|
||||
#include <queue>
|
||||
|
||||
using std::cin;
|
||||
using std::cout;
|
||||
const char endl = '\n';
|
||||
|
||||
const int N = 55 * 55 * 2,
|
||||
M = N * N;
|
||||
const int INF = 0x3f3f3f3f;
|
||||
|
||||
int n, m, s, t, a[55][55], flow, res, ans;
|
||||
int idx, head[N], ver[M << 1], edge[M << 1], next[M << 1];
|
||||
int dis[N], cur[N];
|
||||
|
||||
int id(int x, int y, int k) {
|
||||
return k * n * m + x * m + y;
|
||||
}
|
||||
|
||||
void add(int u, int v, int w) {
|
||||
next[idx] = head[u];
|
||||
ver[idx] = v;
|
||||
edge[idx] = w;
|
||||
head[u] = idx++;
|
||||
}
|
||||
|
||||
bool bfs() {
|
||||
std::fill(std::begin(dis), std::end(dis), 0);
|
||||
|
||||
std::queue<int> q;
|
||||
|
||||
q.emplace(s);
|
||||
dis[s] = 1;
|
||||
cur[s] = head[s];
|
||||
|
||||
while (!q.empty()) {
|
||||
int u = q.front();
|
||||
q.pop();
|
||||
|
||||
for (int i = head[u]; ~i; i = next[i]) {
|
||||
int v = ver[i],
|
||||
w = edge[i];
|
||||
|
||||
if (w && !dis[v]) {
|
||||
dis[v] = dis[u] + 1;
|
||||
cur[v] = head[v];
|
||||
|
||||
if (v == t) return true;
|
||||
|
||||
q.emplace(v);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
int dinic(int u, int limit) {
|
||||
if (u == t) return limit;
|
||||
|
||||
int flow = 0;
|
||||
for (int i = cur[u]; ~i && flow < limit; i = next[i]) {
|
||||
cur[u] = i;
|
||||
|
||||
int v = ver[i],
|
||||
w = edge[i];
|
||||
|
||||
if (w && dis[v] == dis[u] + 1) {
|
||||
int k = dinic(v, std::min(w, limit - flow));
|
||||
|
||||
if (!k) dis[v] = 0;
|
||||
|
||||
edge[i] -= k;
|
||||
edge[i ^ 1] += k;
|
||||
flow += k;
|
||||
}
|
||||
}
|
||||
|
||||
return flow;
|
||||
}
|
||||
|
||||
int main() {
|
||||
std::ios::sync_with_stdio(false);
|
||||
cin.tie(nullptr);
|
||||
|
||||
cin >> n >> m;
|
||||
|
||||
s = 0, t = id(n, m, 1) + 1;
|
||||
std::fill(std::begin(head), std::end(head), -1);
|
||||
|
||||
for (int i = 1; i <= n; i++) {
|
||||
for (int j = 1; j <= m; j++) {
|
||||
cin >> a[i][j];
|
||||
|
||||
add(id(i, j, 0), id(i, j, 1), INF);
|
||||
add(id(i, j, 1), id(i, j, 0), 0);
|
||||
}
|
||||
}
|
||||
|
||||
for (int i = 1; i <= n; i++) {
|
||||
for (int j = 1; j <= m; j++) {
|
||||
int max = 0;
|
||||
|
||||
if (a[i][j] == -1) {
|
||||
add(s, id(i, j, 0), INF);
|
||||
add(id(i, j, 0), s, 0);
|
||||
|
||||
for (int k = i; k >= 1; k--) {
|
||||
max = std::max(max, a[k][j]);
|
||||
}
|
||||
|
||||
for (int k = i; k > 1; k--) {
|
||||
add(id(k, j, 0), id(k - 1, j, 0), max - std::max(a[k][j], 0));
|
||||
add(id(k - 1, j, 0), id(k, j, 0), 0);
|
||||
}
|
||||
} else if (a[i][j] == -2) {
|
||||
add(s, id(i, j, 0), INF);
|
||||
add(id(i, j, 0), s, 0);
|
||||
|
||||
for (int k = i; k <= n; k++) {
|
||||
max = std::max(max, a[k][j]);
|
||||
}
|
||||
|
||||
for (int k = i; k < n; k++) {
|
||||
add(id(k, j, 0), id(k + 1, j, 0), max - std::max(a[k][j], 0));
|
||||
add(id(k + 1, j, 0), id(k, j, 0), 0);
|
||||
}
|
||||
} else if (a[i][j] == -3) {
|
||||
add(id(i, j, 1), t, INF);
|
||||
add(t, id(i, j, 1), 0);
|
||||
|
||||
for (int k = 1; k <= j; k++) {
|
||||
max = std::max(max, a[i][k]);
|
||||
}
|
||||
|
||||
for (int k = 1; k < j; k++) {
|
||||
add(id(i, k, 1), id(i, k + 1, 1), max - std::max(a[i][k + 1], 0));
|
||||
add(id(i, k + 1, 1), id(i, k, 1), 0);
|
||||
}
|
||||
} else if (a[i][j] == -4) {
|
||||
add(id(i, j, 1), t, INF);
|
||||
add(t, id(i, j, 1), 0);
|
||||
|
||||
for (int k = m; k >= j; k--) {
|
||||
max = std::max(max, a[i][k]);
|
||||
}
|
||||
|
||||
for (int k = m; k > j; k--) {
|
||||
add(id(i, k, 1), id(i, k - 1, 1), max - std::max(a[i][k - 1], 0));
|
||||
add(id(i, k - 1, 1), id(i, k, 1), 0);
|
||||
}
|
||||
}
|
||||
|
||||
ans += max;
|
||||
}
|
||||
}
|
||||
|
||||
while (bfs()) {
|
||||
while (flow = dinic(s, INF)) res += flow;
|
||||
}
|
||||
|
||||
cout << ans - res << endl;
|
||||
|
||||
return 0;
|
||||
}
|
BIN
S2OJ/1810/data/problem.conf
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/problem.conf
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower1.in
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower1.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower1.out
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower1.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower10.in
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower10.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower10.out
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower10.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower11.in
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower11.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower11.out
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower11.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower12.in
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower12.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower12.out
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower12.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower13.in
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower13.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower13.out
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower13.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower14.in
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower14.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower14.out
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower14.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower15.in
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower15.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower15.out
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower15.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower16.in
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower16.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower16.out
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower16.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower17.in
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower17.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower17.out
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower17.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower18.in
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower18.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower18.out
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower18.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower19.in
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower19.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower19.out
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower19.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower2.in
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower2.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower2.out
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower2.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower20.in
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower20.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower20.out
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower20.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower3.in
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower3.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower3.out
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower3.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower4.in
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower4.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower4.out
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower4.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower5.in
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower5.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower5.out
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower5.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower6.in
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower6.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower6.out
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower6.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower7.in
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower7.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower7.out
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower7.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower8.in
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower8.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower8.out
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower8.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower9.in
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower9.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
S2OJ/1810/data/tower9.out
(Stored with Git LFS)
Normal file
BIN
S2OJ/1810/data/tower9.out
(Stored with Git LFS)
Normal file
Binary file not shown.
Loading…
Reference in New Issue
Block a user