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Submission #520185

# Submission time Handle Problem Language Result Execution time Memory
520185 2022-01-28T17:11:44 Z tkwiatkowski Raisins (IOI09_raisins) C++17
100 / 100
 247 ms 32244 KB 
/*
	Zadanie: Raisins
	Autor: Tomasz Kwiatkowski
*/

#include <bits/stdc++.h>
#define fi first
#define se second
#define pb push_back

using namespace std;
typedef long long ll;

const int MAXN = 57;

int pref[MAXN][MAXN];
int dp[MAXN][MAXN][MAXN][MAXN];

int sum(int x1, int y1, int x2, int y2)
{
	return pref[x2][y2] - pref[x1 - 1][y2] - pref[x2][y1 - 1] + pref[x1 - 1][y1 - 1];
}

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

	int n, m;
	cin >> n >> m;
	for (int x1 = 1; x1 <= n; ++x1)
		for (int y1 = 1; y1 <= m; ++y1)
			for (int x2 = 1; x2 <= n; ++x2)
				for (int y2 = 1; y2 <= m; ++y2)
					dp[x1][y1][x2][y2] = 1e9;

	for (int i = 1; i <= n; ++i) {
		for (int j = 1; j <= m; ++j) {
			int a;
			cin >> a;
			dp[i][j][i][j] = 0;
			pref[i][j] = pref[i - 1][j] + pref[i][j - 1] - pref[i - 1][j - 1] + a;
		}
	}

	for (int x2 = 1; x2 <= n; ++x2) {
		for (int y2 = 1; y2 <= m; ++y2) {
			for (int x1 = x2; x1 >= 1; --x1) {
				for (int y1 = y2; y1 >= 1; --y1) {
					for (int k = x1; k < x2; ++k)
						dp[x1][y1][x2][y2] = min(dp[x1][y1][k][y2] + dp[k + 1][y1][x2][y2] + sum(x1, y1, x2, y2), dp[x1][y1][x2][y2]);
					for (int k = y1; k < y2; ++k)
						dp[x1][y1][x2][y2] = min(dp[x1][y1][x2][k] + dp[x1][k + 1][x2][y2] + sum(x1, y1, x2, y2), dp[x1][y1][x2][y2]);
					//printf("(%d, %d), (%d, %d) %d\n", x1, y1, x2, y2, dp[x1][y1][x2][y2]);
				}
			}
		}
	}
	cout << dp[1][1][n][m] << '\n';
	return 0;
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 448 KB Output is correct
6 Correct 1 ms 972 KB Output is correct
7 Correct 1 ms 1100 KB Output is correct
8 Correct 3 ms 3532 KB Output is correct
9 Correct 5 ms 5196 KB Output is correct
10 Correct 6 ms 6204 KB Output is correct
11 Correct 5 ms 5180 KB Output is correct
12 Correct 18 ms 11300 KB Output is correct
13 Correct 28 ms 14668 KB Output is correct
14 Correct 12 ms 6488 KB Output is correct
15 Correct 49 ms 16524 KB Output is correct
16 Correct 5 ms 5708 KB Output is correct
17 Correct 15 ms 11624 KB Output is correct
18 Correct 97 ms 24928 KB Output is correct
19 Correct 166 ms 30340 KB Output is correct
20 Correct 247 ms 32244 KB Output is correct