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Cod sursa(job #4252)
#include <fstream.h>
#include <iostream.h>
int v[10001],C[1001];
int main()
{
int G,W,i,j,E;
long sum;
ifstream f("energii.in");
ofstream g("energii.out");
f>>G>>W;
for(i=1;i<=G;i++)
{
f>>E;
f>>C[i];
sum+=C[i];
}
f.close();
if(sum<W) {g<<-1; g.close(); return 0;}
v[0]=-1;
for(i=1;i<=G;i++)
for(j=W;j>=0;j--)
if(v[j]!=0 && v[j+C[i]]==0)
v[j+C[i]]=C[i];
long minim;
i=W;
while(v[i]==0) i++;
minim=v[i];
for(j=i+1;j<10001;j++)
if(v[i]<minim)
minim=v[i];
g.close();
return 0;
}