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Cod sursa(job #741172)
#include <fstream>
using namespace std;
int v[15001],i,j,e,g,n,w,c;
int main()
{
ifstream f("energii.in");
ofstream h("energii.out");
for(i=1;i<=15000;i++)v[i]=1000000000;
f>>n>>w;
for(i=1;i<=n;i++)
f>>e>>c;
for(j=w-1;j>=0;j--){
if(v[j]!=1000000000&&v[j]+c<v[j+e])v[j+e]=v[j]+c;
}
for(i=w;i<=15001;i++){
if(v[i]!=1000000000){h<<v[i];break;}
if(i==15001){h<<-1;break;}
}
return 0;
}