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Submission #384991

# Submission time Handle Problem Language Result Execution time Memory
384991 2021-04-02T20:38:11 Z ritul_kr_singh Raisins (IOI09_raisins) C++17
100 / 100
 749 ms 49260 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define sp << ' ' <<
#define nl << '\n'

int n, m;
int g[50][50], dp[50][50][50][50];

int calc(int xa, int ya, int xb, int yb){
	if(xa==xb and ya==yb) return dp[xa][ya][xb][yb] = 0;
	if(dp[xa][ya][xb][yb]!=-1) return dp[xa][ya][xb][yb];

	int sum = g[xb][yb];
	if(xa) sum -= g[xa-1][yb];
	if(ya) sum -= g[xb][ya-1];
	if(xa and ya) sum += g[xa-1][ya-1];

	int res = 1e18;

	for(int i=xa; i<xb; ++i)
		res = min(res, calc(xa, ya, i, yb) + calc(i+1, ya, xb, yb));
	for(int i=ya; i<yb; ++i)
		res = min(res, calc(xa, ya, xb, i) + calc(xa, i+1, xb, yb));
	return dp[xa][ya][xb][yb] = res + sum;
}

signed main(){
	cin.tie(0)->sync_with_stdio(0);
	cin >> n >> m;
	for(int i=0; i<n; ++i){
		for(int j=0; j<m; ++j){
			cin >> g[i][j];
			if(i) g[i][j] += g[i-1][j];
			if(j) g[i][j] += g[i][j-1];
			if(i and j) g[i][j] -= g[i-1][j-1];
			for(int k=0; k<n; ++k)
				for(int l=0; l<m; ++l)
					dp[i][j][k][l] = -1;
		}
	}

	cout << calc(0, 0, n-1, m-1);
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 492 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 620 KB Output is correct
6 Correct 2 ms 1260 KB Output is correct
7 Correct 2 ms 1516 KB Output is correct
8 Correct 11 ms 4844 KB Output is correct
9 Correct 19 ms 7276 KB Output is correct
10 Correct 27 ms 8812 KB Output is correct
11 Correct 23 ms 7148 KB Output is correct
12 Correct 79 ms 16620 KB Output is correct
13 Correct 129 ms 21972 KB Output is correct
14 Correct 37 ms 8940 KB Output is correct
15 Correct 158 ms 24812 KB Output is correct
16 Correct 18 ms 8684 KB Output is correct
17 Correct 66 ms 17644 KB Output is correct
18 Correct 403 ms 38380 KB Output is correct
19 Correct 647 ms 46572 KB Output is correct
20 Correct 749 ms 49260 KB Output is correct