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Submission #360025

# Submission time Handle Problem Language Result Execution time Memory
360025 2021-01-27T12:12:09 Z Poimidorka Maxcomp (info1cup18_maxcomp) C++14
60 / 100
 500 ms 92836 KB 
#include <iostream>
#include <vector>
#include <set>
#include <map>
#include <unordered_map>
#include <unordered_set>
#include <deque>
#include <queue>
#include <string>
#include <algorithm>
#include <tuple>
#include <cassert>


using namespace std;


#define x first
#define y second
#define int long long

const int maxn = 1e3 + 10;

int mat[maxn][maxn];
int opt[maxn][maxn];


vector<pair<int, int>> dir = {{0, -1}, {0, 1}, {1, 0}, {-1, 0}};
int n, m;


bool check(int x, int y) {
	return x >= 0 && y >= 0 && x < n && y < m;
}

int solve() {
	int ans = -1;
	for (int i = 0; i < n; i++) {
		for (int j = 0; j < m; j++) {
			for (int i2 = 0; i2 < n; i2++) {
				for (int j2 = 0; j2 < m; j2++) {
					if (mat[i][j] <= mat[i2][j2])
						ans = max(ans, mat[i2][j2] - mat[i][j] - abs(i - i2) - abs(j - j2) - 1);
				}
			}
		}
	}
	return ans;
}

signed main() {
#ifdef LC
	assert(freopen("input.txt", "r", stdin));
#endif
	ios::sync_with_stdio(0); cin.tie(0);
	cin >> n >> m;
	int ans = -1;
	bool f = 0;
	set<pair<pair<int, int>, pair<int, int>>> q;
	for (int i = 0; i < n; i++) {
		for (int j = 0; j < m; j++) {
			cin >> mat[i][j];
			if (mat[i][j] != mat[0][0])
				f = 1;			
			opt[i][j] = -1;
			q.insert({{mat[i][j], -1}, {i, j}});
		}
	}
	while (!q.empty()) {
		auto v = *q.rbegin();
		q.erase(v);
		int x = v.y.x;
		int y = v.y.y;
		// cout << x << ' ' << y << ' ' << v.x.y << endl;
		for (auto el : dir) {
			int x2 = el.x + x;
			int y2 = el.y + y;
			if (!check(x2, y2) || mat[x2][y2] > mat[x][y])
				continue;
			// cout << x2 << ' ' << y2 << endl;
			if (opt[x2][y2] < opt[x][y] + mat[x][y] - mat[x2][y2] - 1) {
				q.erase({{mat[x2][y2], opt[x2][y2]}, {x2, y2}});
				opt[x2][y2] = max(opt[x2][y2], opt[x][y] + mat[x][y] - mat[x2][y2] - 1); 
				q.insert({{mat[x2][y2], opt[x2][y2]}, {x2, y2}});
				ans = max(ans, opt[x2][y2]);
			}
		}
	}
	// if (ans == -1 && f)
	// 	assert(0);
	cout << solve();
	return 0;
}

Compilation message

maxcomp.cpp: In function 'int main()':
maxcomp.cpp:58:7: warning: variable 'f' set but not used [-Wunused-but-set-variable]
   58 |  bool f = 0;
      |       ^

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 492 KB Output is correct
2 Correct 5 ms 492 KB Output is correct
3 Correct 4 ms 492 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 27 ms 1004 KB Output is correct
10 Correct 22 ms 1004 KB Output is correct
11 Correct 22 ms 1004 KB Output is correct
12 Correct 22 ms 1004 KB Output is correct
13 Correct 24 ms 1004 KB Output is correct
14 Correct 27 ms 1004 KB Output is correct

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 4 ms 492 KB Output is correct
10 Correct 5 ms 492 KB Output is correct
11 Correct 4 ms 492 KB Output is correct
12 Correct 27 ms 1004 KB Output is correct
13 Correct 22 ms 1004 KB Output is correct
14 Correct 22 ms 1004 KB Output is correct
15 Correct 22 ms 1004 KB Output is correct
16 Correct 24 ms 1004 KB Output is correct
17 Correct 27 ms 1004 KB Output is correct
18 Execution timed out 1083 ms 92836 KB Time limit exceeded
19 Halted 0 ms 0 KB -