#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define INF 100000000000
#define MAXN 55
typedef pair<ll int,ll int> pii;
ll int dp[52][52][52][52];//mapi[i][j][ii][jj] é answer para a submatriz
ll int presum[MAXN][MAXN];
ll int arr[MAXN][MAXN];
ll int k;
void aa(){
ll int i,j,ii,jj;
for(i=0;i<50;i++){
for(j=0;j<50;j++){
for(ii=0;ii<=i;ii++){
for(jj=0;jj<=j;jj++){
dp[i][j][ii][jj]=INF;
}
}
}
}
}
ll int getsum(ll int i,ll int j, ll int ii, ll int jj){
ll int ans=presum[i][j];
if(jj==0&&ii==0)return ans;
if(ii==0){
ans-=presum[i][jj-1];
return ans;
}
if(jj==0){
ans-=presum[ii-1][j];
return ans;
}
ans-=presum[i][jj-1];
ans-=presum[j][ii-1];
ans+=presum[ii-1][jj-1];
return ans;
}
ll int build(ll int i,ll int j,ll int ii,ll int jj){
if(i==ii&&j==jj){
dp[i][j][i][j]=0;
return 0;
}
if(dp[i][j][ii][jj]!=INF)return dp[i][j][ii][jj];
/*
if(j==jj&&i==ii+1){
dp[i][j][ii][jj] = arr[i][j]+arr[ii][j];
return 0;
}
if(i==ii&&j==jj+1){
dp[i][j][ii][jj] = arr[i][j]+arr[i][jj];
return 0;
}
if(i==ii+1&&j==jj+1){
dp[i][j][ii][jj] = arr[i][j]+arr[ii][jj]+arr[ii][j]+arr[i][jj];
dp[i][j][ii][jj]*=2;
return 0;
}*/
ll int nii,njj,sum,ans=INF;
sum=getsum(i,j,ii,jj);
for(njj=j-1;njj>=jj;njj--){
ans=min(ans, build(i,j,ii,njj+1) + build(i,njj,ii,jj) );
}
//fazer o mesmo na horizontal
for(nii=i-1;nii>=ii;nii--){
ans=min(ans, build( i,j,nii+1,jj ) + build(nii,j,ii,jj) );
}
dp[i][j][ii][jj]=min(dp[i][j][ii][jj], ans+sum);
return dp[i][j][ii][jj];
}
int main(){
ll int n,m,i,j,ans;
scanf("%lld %lld", &n, &m);
for(i=0;i<n;i++){
for(j=0;j<m;j++){
scanf("%lld", &arr[i][j]);
if(i==0&&j==0){presum[i][j]=arr[0][0]; continue;}
if(i==0){
presum[i][j]=presum[i][j-1]+arr[i][j];
}else if(j==0){
presum[i][j]=presum[i-1][j]+arr[i][j];
}else{
presum[i][j]=presum[i-1][j]+presum[i][j-1]-presum[i-1][j-1]+arr[i][j];
}
}
}
aa();
ans=build(n-1,m-1,0,0);
/*
for(i=0;i<n;i++){
for(j=0;j<m;j++){
cout<<dp[i][j][0][0]<<" ";
}cout<<endl;
}cout<<endl;*/
cout<<ans<<'\n';
return 0;
}
Compilation message
raisins.cpp: In function 'int main()':
raisins.cpp:109:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%lld %lld", &n, &m);
~~~~~^~~~~~~~~~~~~~~~~~~~~
raisins.cpp:116:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%lld", &arr[i][j]);
~~~~~^~~~~~~~~~~~~~~~~~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
20 ms |
35072 KB |
Output is correct |
| 2 |
Correct |
19 ms |
35072 KB |
Output is correct |
| 3 |
Incorrect |
20 ms |
35072 KB |
Output isn't correct |
| 4 |
Incorrect |
19 ms |
35072 KB |
Output isn't correct |
| 5 |
Incorrect |
19 ms |
35072 KB |
Output isn't correct |
| 6 |
Incorrect |
19 ms |
35072 KB |
Output isn't correct |
| 7 |
Incorrect |
19 ms |
35072 KB |
Output isn't correct |
| 8 |
Incorrect |
26 ms |
35072 KB |
Output isn't correct |
| 9 |
Incorrect |
33 ms |
35072 KB |
Output isn't correct |
| 10 |
Incorrect |
39 ms |
35072 KB |
Output isn't correct |
| 11 |
Incorrect |
35 ms |
35200 KB |
Output isn't correct |
| 12 |
Incorrect |
80 ms |
35072 KB |
Output isn't correct |
| 13 |
Incorrect |
139 ms |
35072 KB |
Output isn't correct |
| 14 |
Incorrect |
47 ms |
35072 KB |
Output isn't correct |
| 15 |
Incorrect |
159 ms |
35072 KB |
Output isn't correct |
| 16 |
Incorrect |
29 ms |
35072 KB |
Output isn't correct |
| 17 |
Incorrect |
69 ms |
35072 KB |
Output isn't correct |
| 18 |
Incorrect |
436 ms |
35160 KB |
Output isn't correct |
| 19 |
Incorrect |
768 ms |
35196 KB |
Output isn't correct |
| 20 |
Incorrect |
917 ms |
35192 KB |
Output isn't correct |
