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Submission #537774

# Submission time Handle Problem Language Result Execution time Memory
537774 2022-03-15T13:37:57 Z perchuts Raisins (IOI09_raisins) C++17
100 / 100
 150 ms 20972 KB 
#include <bits/stdc++.h>
#define maxn (int)(1e5+51)
#define all(x) x.begin(), x.end()
#define sz(x) (int) x.size()
#define endl '\n'
#define ll long long
#define pb push_back
#define ull unsigned long long
#define ii pair<int,int>
#define iii tuple<int,int,int>
#define inf 2000000001
#define mod 1000000007 //998244353
#define _ ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);

using namespace std;

template<typename X, typename Y> bool ckmin(X& x, const Y& y) { return (y < x) ? (x=y,1):0; }
template<typename X, typename Y> bool ckmax(X& x, const Y& y) { return (x < y) ? (x=y,1):0; }

int grid[51][51], pr[51][51], dp[51][51][51][51];

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

int main(){_
    int n,m;cin>>n>>m;

    for(int i=1;i<=n;++i)
        for(int j=1;j<=m;++j)
            cin>>grid[i][j];    

    for(int i=1;i<=n;++i)
        for(int j=1;j<=m;++j)
            pr[i][j] = pr[i-1][j] + pr[i][j-1] - pr[i-1][j-1] + grid[i][j];

    for(int x1=n;x1>=1;--x1){
        for(int y1=m;y1>=1;--y1){
            for(int x2=x1;x2<=n;++x2){
                for(int y2=y1;y2<=m;++y2){
                    if(x1==x2&&y1==y2)dp[x1][y1][x2][y2] = 0;
                    else{
                        dp[x1][y1][x2][y2] = calcRect(x1,y1,x2,y2);
                        int best = inf;
                        for(int k=x1;k<x2;++k)ckmin(best,dp[x1][y1][k][y2]+dp[k+1][y1][x2][y2]);
                        for(int k=y1;k<y2;++k)ckmin(best,dp[x1][y1][x2][k]+dp[x1][k+1][x2][y2]);
                        dp[x1][y1][x2][y2] += best;
                    }
                }
            }
        }
    }
    
    cout<<dp[1][1][n][m]<<endl;
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 1 ms 852 KB Output is correct
7 Correct 1 ms 904 KB Output is correct
8 Correct 2 ms 2644 KB Output is correct
9 Correct 4 ms 3668 KB Output is correct
10 Correct 6 ms 4308 KB Output is correct
11 Correct 4 ms 3796 KB Output is correct
12 Correct 18 ms 7380 KB Output is correct
13 Correct 21 ms 9392 KB Output is correct
14 Correct 6 ms 4692 KB Output is correct
15 Correct 26 ms 10416 KB Output is correct
16 Correct 3 ms 3540 KB Output is correct
17 Correct 11 ms 7228 KB Output is correct
18 Correct 86 ms 16036 KB Output is correct
19 Correct 132 ms 19512 KB Output is correct
20 Correct 150 ms 20972 KB Output is correct