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Cod sursa(job #915860)
#include <iostream>
#include <fstream>
using namespace std;
int p,i,j,nr,k,h;
int main()
{
ifstream fin("fact.in");
ofstream fout("fact.out");
fin>>p;
i=6;
k=0;
h=0;
while(nr<p)
{
h=h+25;
nr=nr+i;
k=k+1;
if(k==4)
{
k=0;
i++;
}
}
if(nr==p)fout<<h;
else
{
nr-=i;
h=h-25;
for(j=1;j<=i&&nr!=p;j++)
{
h+=5;
nr++;
}
fout<<h;
}
fin.close();
return 0;
}