Cod sursa(job #2731034)
Utilizator | Data | 27 martie 2021 11:17:33 | |
---|---|---|---|
Problema | Pairs | Scor | 20 |
Compilator | cpp-64 | Status | done |
Runda | simulare_oni_cex | Marime | 0.46 kb |
#include <bits/stdc++.h>
using namespace std;
ifstream f("pairs.in");
ofstream g("pairs.out");
int n,ans,v[100005];
int cmmdc(int a,int b)
{
while(b)
{
int r=a%b;
a=b;
b=r;
}
return a;
}
int main()
{
f>>n;
for(int i=1; i<=n; i++)
f>>v[i];
for(int i=1;i<n;i++)
for(int j=i+1;j<=n;j++)
if(cmmdc(v[i],v[j])==1)
ans++;
g<<ans;
return 0;
}