Cod sursa(job #110709)
Utilizator | Data | 27 noiembrie 2007 15:48:02 | |
---|---|---|---|
Problema | Pairs | Scor | 0 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.5 kb |
//pairs
#include<fstream.h>
int cmmdc(int x, int y)
{while(x!=y)
{if(x>y) if(x%y) x%=y;
else x=y;
else if(y%x) y%=x;
else y=x;
}
return x;}
int main()
{long int n, m[100001],i,j,nr=0;
ifstream f("pairs.in");
ofstream g("pairs.out");
f>>n;
for(i=1;i<=n;i++)
f>>m[i];
for(i=1;i<n;i++)
for(j=i+1;j<=n;j++)
if(m[i]%m[j]==0 || m[i]%m[j]==0)nr++ else
if(m[i]%2==1 || m[j]%2==1)
if(cmmdc(m[i],m[j])==1) nr++;
g<<nr<<'\n';
f.close();
g.close();
return 0;
}