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Cod sursa(job #167015)
#include<fstream>
using namespace std;
unsigned long v[30005],x[30005],y[30005],g[30005];
int main()
{unsigned long p=0,T=0,ti=0,min,i,n;
ifstream fin("bilute.in");
ofstream fout("bilute.out");
fin>>n;
for(i=1;i<=n;i++)
{fin>>v[i]>>g[i];
T+=v[i]*g[i];
x[i]=x[i-1]+v[i]*i;
y[i]=y[i-1]+v[i];
}
min=-20000005;
for(i=1;i<=n;i++)
{ti=T-(v[i]*g[i])+x[n]-x[i]-i*(y[n]-y[i])+i*(y[i-1])-(x[i-1]);
if(ti<=min)
{min=ti;
p=i;
}
}
fout<<p<<" "<<min;
fin.close();
fout.close();
return 0;
}