# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
235804 | Pbezz | Raisins (IOI09_raisins) | C++14 | 971 ms | 35192 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#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[ii-1][j];
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];
ll int nii,njj,sum=getsum(i,j,ii,jj),ans=INF;
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);
cout<<ans<<'\n';
return 0;
}
Compilation message (stderr)
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---|---|---|---|---|
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