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- */zad kolo 4 /*
- #include <stdio.h>
- int main(){
- int n, x, i=0, t[1000], suma=0;
- scanf("%d", &n);
- for(i=0;i<1000;i++) t[i]=0;
- while(n--){
- scanf("%d", &x);
- t[x]+=1;
- }
- for(i=0;i<1000;i++){
- x = t[i];
- suma+=x*(x-1)/2;
- }
- printf("%d", suma);
- return 0;
- }
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