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Submission #746598

# Submission time Handle Problem Language Result Execution time Memory
746598 2023-05-22T21:29:34 Z ZeroCool Raisins (IOI09_raisins) C++14
100 / 100
 248 ms 72056 KB 
#include <bits/stdc++.h>
#define ll long long
#define debug(x) cerr<<x<<endl

using namespace std;


const int mxn = 55;
const ll inf = 1e18;

int n,m;

ll A[mxn][mxn];
ll memo[mxn][mxn][mxn][mxn];
ll pref[mxn][mxn];




ll f(int x1,int x2,int y1,int y2){
	
	if(x1 == x2 && y1 == y2)return 0;
	if(memo[x1][x2][y1][y2] != -1)return memo[x1][x2][y1][y2];

	ll ans = inf;

	//Cut horizontally
	for(int i = x1;i<x2;i++){
		ans = min(ans, f(x1,i,y1,y2) + f(i+1,x2,y1,y2));
	}
	//Cut vetically
	for(int i = y1;i<y2;i++){
		ans = min(ans, f(x1,x2,y1,i) + f(x1,x2,i+1,y2));
	}

	return memo[x1][x2][y1][y2] = ans + (pref[x2][y2] - pref[x1-1][y2] - pref[x2][y1-1] + pref[x1-1][y1-1]);
}

void solve(int T){
	cin>>n>>m;
	for(int i = 1;i<=n;i++){
		for(int j = 1;j<=m;j++){
			cin>>A[i][j];
		}
	}
	memset(memo,-1,sizeof(memo));
	memset(pref,0,sizeof(pref));

	for(int i = 1;i<=n;i++){
		for(int j = 1;j<=m;j++){
			pref[i][j] = pref[i-1][j] + pref[i][j-1] + A[i][j] - pref[i-1][j-1];
		}
	}
	cout<<f(1,n,1,m)<<endl;

}

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

	int t = 1;
//	cin>>t;
	for(int i = 1;i<=t;i++)solve(i);
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 27 ms 71844 KB Output is correct
2 Correct 31 ms 71956 KB Output is correct
3 Correct 28 ms 71964 KB Output is correct
4 Correct 31 ms 71860 KB Output is correct
5 Correct 32 ms 71912 KB Output is correct
6 Correct 28 ms 71880 KB Output is correct
7 Correct 32 ms 71936 KB Output is correct
8 Correct 33 ms 71948 KB Output is correct
9 Correct 40 ms 71868 KB Output is correct
10 Correct 40 ms 71884 KB Output is correct
11 Correct 33 ms 72056 KB Output is correct
12 Correct 45 ms 71888 KB Output is correct
13 Correct 66 ms 71912 KB Output is correct
14 Correct 37 ms 71884 KB Output is correct
15 Correct 67 ms 71984 KB Output is correct
16 Correct 33 ms 71900 KB Output is correct
17 Correct 41 ms 71884 KB Output is correct
18 Correct 159 ms 71884 KB Output is correct
19 Correct 224 ms 71984 KB Output is correct
20 Correct 248 ms 71992 KB Output is correct