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Cod sursa(job #22297)
#include<fstream.h>
ifstream f("energii.in");
ofstream k("energii.out");
float a[1000000][3];
int g,w;
int main()
{ int i,r=0,c=0;
float aux;
f>>g>>w;
for(i=1;i<=g;i++) f>>a[i][0]>>a[i][1];
for(i=1;i<=g;i++) a[i][2]=(a[i][0]/a[i][1]);
for(i=1;i<=g;i++) if(a[i][2]<a[i+1][2]) { aux=a[i+1][2];
a[i+1][2]=a[i][2];
a[i][2]=aux;
aux=a[i+1][1];
a[i+1][1]=a[i][1];
a[i][1]=aux;
aux=a[i+1][0];
a[i+1][0]=a[i][0];
a[i][0]=aux;
}
i=1;
while(r<w)
{ r+=(int)a[i][0];
c+=(int)a[i][1];
i++;
}
k<<c;
g<<'\n';
}