oj.uz

Submission #311841

# Submission time Handle Problem Language Result Execution time Memory
311841 2020-10-11T23:12:44 Z ShiftyBlock Raisins (IOI09_raisins) C++11
100 / 100
 1777 ms 28032 KB 
#include <bits/stdc++.h>
using namespace std;
#define f first
#define s second
#define pii pair<int, int>
#define long long long
#define v vector
#define rep(i,a,b) for(int i=a; i<b; i++)
void setIO(string name, int submit) {
    if (submit) {
        ios_base::sync_with_stdio(0);
        cin.tie(0);
        freopen((name + ".in").c_str(), "r", stdin);
        freopen((name + ".out").c_str(), "w", stdout);
    }
}
const int MAXN=52;
int arr[MAXN][MAXN];
int dp[MAXN][MAXN][MAXN][MAXN];
int N, M;
int recurse(int ix, int iy, int jx, int jy){
	if(jx-ix==0 && jy-iy==0) {
		dp[ix][iy][jx][jy]=0;
	}
	if(dp[ix][iy][jx][jy]==-1){
		int best=1<<30;
		for(int row= iy+1; row<=jy; row++){
			best= min(best, recurse(ix, row, jx, jy)+recurse(ix, iy, jx, row-1));
		}
		for(int col= ix+1; col<=jx; col++){
			best= min(best, recurse(col, iy, jx, jy)+ recurse(ix, iy, col-1, jy));
		}
		int base=arr[jx][jy]-arr[ix-1][jy]-arr[jx][iy-1]+arr[ix-1][iy-1];
		dp[ix][iy][jx][jy]= best+base;
	}
	return dp[ix][iy][jx][jy];
}

int main() {
    setIO("", 0);
    cin >>N>>M;
    rep(i,1,N+1){
    	rep(j,1,M+1){
    		cin>> arr[i][j];
    		arr[i][j]+=arr[i-1][j]+arr[i][j-1]-arr[i-1][j-1];
    	}
    }
    rep(i,0,N+1){
    	rep(j,0,M+1){
    		rep(k,0,N+1){
    			rep(l,0,M+1){
    				dp[i][j][k][l]=-1;
    			}
    		}
    	}
    }
    cout << recurse(1,1,N,M)<< endl;
    
    return 0;
}

Compilation message

raisins.cpp: In function 'void setIO(std::string, int)':
raisins.cpp:13:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   13 |         freopen((name + ".in").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
raisins.cpp:14:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   14 |         freopen((name + ".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 1 ms 512 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 640 KB Output is correct
6 Correct 1 ms 1152 KB Output is correct
7 Correct 1 ms 1408 KB Output is correct
8 Correct 13 ms 3840 KB Output is correct
9 Correct 22 ms 5504 KB Output is correct
10 Correct 33 ms 6528 KB Output is correct
11 Correct 30 ms 5624 KB Output is correct
12 Correct 107 ms 11520 KB Output is correct
13 Correct 186 ms 14200 KB Output is correct
14 Correct 50 ms 6912 KB Output is correct
15 Correct 237 ms 15352 KB Output is correct
16 Correct 17 ms 5632 KB Output is correct
17 Correct 81 ms 10488 KB Output is correct
18 Correct 693 ms 21760 KB Output is correct
19 Correct 1497 ms 26472 KB Output is correct
20 Correct 1777 ms 28032 KB Output is correct