Submission #523412

#	Time	Username	Problem	Language	Result	Execution time	Memory
523412		boykut	UFO (IZhO14_ufo)	C++14	30 / 100	2098 ms	9044 KiB

ufo

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

typedef tree<int, null_type, less<int>,
rb_tree_tag, tree_order_statistics_node_update> ordered_set;

vector<vector<int>> a;
vector<vector<long long>> pref;

int getmaxRow(int x, int l, int r) {
	int ans = INT_MIN;
	for (int j = l; j <= r; j++) ans = max(ans, a[x][j]);
	return ans;
};

int getmaxCol(int x, int l, int r) {
	int ans = INT_MIN;
	for (int j = l; j <= r; j++) ans = max(ans, a[j][x]);
	return ans;
};

void updateRow(int x, int j) {
	a[x][j]--;
}
void updateCol(int x, int j) {
	a[j][x]--;
}

int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);

	int n, m, r, k, p;
	cin >> n >> m >> r >> k >> p;

	a = vector<vector<int>>(n, vector<int>(m));

	for (int i = 0; i < n; i++) {
		for (int j = 0; j < m; j++) {
			cin >> a[i][j];
		}
	}

	while (k--) {
		char c; cin >> c;
		int x, y; cin >> x >> y;
		int cnt = r;
		x--;		

		if (c == 'W') {
			int start = 0;
			while (cnt > 0 && start < m) {
				int l = start, r = m - 1;
				while (l < r) {
					int m = (l + r) / 2;
					if (getmaxRow(x, start, m) >= y)
						r = m;
					else
						l = m + 1;
				}
				if (getmaxRow(x, start, r) >= y) {
					updateRow(x, r);
					cnt--;
					start = r + 1;
				} else break;
			}
		} else if (c == 'E') {
			int start = m - 1;
			while (cnt > 0 && start >= 0) {
				int l = 0, r = start;
				while (l < r) {
					int m = (l + r + 1) / 2;
					if (getmaxRow(x, m, start) >= y)
						l = m;
					else
						r = m - 1;
				}
				if (getmaxRow(x, l, start) >= y) {
					updateRow(x, l);
					cnt--;
					start = l - 1;
				} else break;
			}
		} else if (c == 'N') {
			int start = 0;
			while (cnt > 0 && start < n) {
				int l = start, r = n - 1;
				while (l < r) {
					int m = (l + r) / 2;
					if (getmaxCol(x, start, m) >= y)
						r = m;
					else
						l = m + 1;
				}
				if (getmaxCol(x, start, r) >= y) {
					updateCol(x, r);
					cnt--;
					start = r + 1;
				} else break;
			}
		} else {
			int start = n - 1;
			while (cnt > 0 && start >= 0) {
				int l = 0, r = start;
				while (l < r) {
					int m = (l + r + 1) / 2;
					if (getmaxCol(x, m, start) >= y)
						l = m;
					else
						r = m - 1;
				}
				if (getmaxCol(x, l, start) >= y) {
					updateCol(x, l);
					cnt--;
					start = l - 1;
				} else break;
			}
		}
	}

	pref = vector<vector<long long>>(n, vector<long long>(m));
	for (int i = 0; i < n; i++) {
		for (int j = 0; j < m; j++) {
			//cout << a[i][j] << ' ';
			pref[i][j] = a[i][j];
			pref[i][j] += (i ? pref[i-1][j] : 0);
			pref[i][j] += (j ? pref[i][j-1] : 0);
			pref[i][j] -= (i && j ? pref[i-1][j-1] : 0);
		}
		//cout << '\n';
	}

	auto get = [&](int a, int b, int c, int d) ->long long {
		long long s = pref[c][d];
		s -= (a ? pref[a-1][d] : 0);
		s -= (b ? pref[c][b-1] : 0);
		s += (a && b ? pref[a-1][b-1] : 0);
		return s;
	};

	long long ans = LLONG_MIN;
	for (int i = 0; i + p - 1 < n; i++) {
		for (int j = 0; j + p - 1 < m; j++) {
			ans = max(ans, get(i, j, i + p - 1, j + p - 1));
		}
	}
	cout << ans << '\n';

	return 0;
}

• Subtask 1: 30 / 100