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Cod sursa(job #25053)
#include<stdio.h>
int main(){
int mat[10000][3];
long ct=0;
freopen("puteri.out","w+",stdout);
freopen("puteri.in","rt",stdin);
long n,i,j,k,po;
scanf("%ld",&n);
for(i=0;i<n;i++)
for(j=0;j<3;j++)
scanf("%d",&mat[i][j]);
for(i=0;i<n-1;i++)
for(j=i+1;j<n;j++){
po=mat[i][0]+mat[j][0];
if(!po)
po=mat[i][1]+mat[j][1];
if(!po)
po=mat[i][2]+mat[j][2];
if((mat[i][0]+mat[j][0])==po||!(mat[i][0]+mat[j][0]))
if((mat[i][1]+mat[j][1])==po||!(mat[i][1]+mat[j][1]))
if((mat[i][2]+mat[j][2])==po||!(mat[i][2]+mat[j][2]))
ct++;
}
printf("%ld",ct);
return 1;
}