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Cod sursa(job #283847)
#include<fstream.h>
main()
{ ifstream in("fractii.in");
ofstream o("fractii.out");
long i, m=0,j,x,n,a,b,s,k;
in>>n;
s=n;
for(i=2;i<=n;i++)
for(j=1;j<=n;j++)
{ a=i%10;
b=j%10;
if(a==0)
a=i;
if(b==0)
b=j;
k=1;
while(a!=b&&k==1)
{ if(a>b)
a-=b;
else
b-=a;
if(a==1||b==1)
k=0;
}
if(a==1||b==1)
s++;
}
o<<s;
in.close();
o.close();
return 0;
}