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OI-codes/Luogu/P1527/P1527.cpp

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#include <iostream>
#include <limits>
#include <tuple>
#include <vector>
using std::cin;
using std::cout;
const char endl = '\n';
const int N = 505,
Q = 6e5 + 5;
int n, q, ans[Q], tr[N][N];
std::vector<std::tuple<int, int, int, int, int, int>> qs;
int lowbit(int x) {
return x & -x;
}
void add(int x, int y, int v) {
for (int i = x; i <= n; i += lowbit(i)) {
for (int j = y; j <= n; j += lowbit(j)) {
tr[i][j] += v;
}
}
}
int query(int x, int y) {
int res = 0;
for (int i = x; i; i -= lowbit(i)) {
for (int j = y; j; j -= lowbit(j)) {
res += tr[i][j];
}
}
return res;
}
void solve(const std::vector<std::tuple<int, int, int, int, int, int>> &qs, long long l, long long r) {
if (qs.empty()) return;
if (l == r) {
for (auto o : qs) {
if (std::get<5>(o)) {
ans[std::get<5>(o)] = l;
}
}
return;
}
long long mid = l + r >> 1;
std::vector<std::tuple<int, int, int, int, int, int>> ql, qr;
for (auto o : qs) {
int x, y, a, b, k, id;
std::tie(x, y, a, b, k, id) = o;
if (id) {
int t = query(a, b) - query(x - 1, b) - query(a, y - 1) + query(x - 1, y - 1);
if (t >= k) {
ql.emplace_back(o);
} else {
qr.emplace_back(x, y, a, b, k - t, id);
}
} else {
if (k <= mid) {
add(x, y, 1);
ql.emplace_back(o);
} else {
qr.emplace_back(o);
}
}
}
for (auto o : ql) {
int x, y, k, id;
std::tie(x, y, std::ignore, std::ignore, k, id) = o;
if (!id && k <= mid) add(x, y, -1);
}
solve(ql, l, mid);
solve(qr, mid + 1, r);
}
int main() {
std::ios::sync_with_stdio(false);
cin.tie(nullptr);
cin >> n >> q;
for (int i = 1; i <= n; i++) {
for (int j = 1, x; j <= n; j++) {
cin >> x;
qs.emplace_back(i, j, 0, 0, x, 0);
}
}
for (int i = 1, x, y, a, b, k; i <= q; i++) {
cin >> x >> y >> a >> b >> k;
qs.emplace_back(x, y, a, b, k, i);
}
solve(qs, std::numeric_limits<int>::min(), std::numeric_limits<int>::max());
for (int i = 1; i <= q; i++) {
cout << ans[i] << endl;
}
return 0;
}