Submission #44724

#	Time	Username	Problem	Language	Result	Execution time	Memory
44724		cheater2k	Maxcomp (info1cup18_maxcomp)	C++17	0 / 100	2 ms	460 KiB

maxcomp

#include <bits/stdc++.h>
using namespace std;

const long long INF = 1e18;
const int N = 1005;
const int dx[] = {0, 0, -1, +1}, dy[] = {-1, +1, 0, 0};

int n, m;
int a[N][N];
long long dp[N][N];
long long res = -INF;
vector < pair<int,int> > vals;

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

	cin >> n >> m;
	for (int i = 1; i <= n; ++i) {
		for (int j = 1; j <= m; ++j) {
			cin >> a[i][j];
			vals.push_back(make_pair(i, j));
		}
	}

	sort(vals.begin(), vals.end(), [&](pair<int,int> p, pair<int,int> q) {
		return a[p.first][p.second] > a[q.first][q.second];
	});

	for (int i = 1; i <= n; ++i) {
		for (int j = 1; j <= m; ++j) {
			dp[i][j] = -INF;
		}
	}

	for (auto &c : vals) {
		int i = c.first, j = c.second;
		dp[i][j] = -1;
		for (int dir = 0; dir < 4; ++dir) {
			int ni = i + dx[dir], nj = j + dy[dir];
			if (ni < 1 || ni > n || nj < 1 || nj > m) continue;
			dp[i][j] = max(dp[i][j], dp[ni][nj] + a[ni][nj] - 1 - a[i][j]);
		}

		res = max(res, dp[i][j]);
	}

	cout << res << endl;
}

• Subtask 1: 0 / 15
• Subtask 2: 0 / 15
• Subtask 3: 0 / 30
• Subtask 4: 0 / 40