#include <stdio.h>
int main(){
int n;
if(scanf("%d", &n
) != 1) return 0; int total_usia = 0;
for (int i = 0; i < n; i++){
int usia;
char nama[100];
scanf("%d;[^\n]", &usia
, nama
); total_usia += usia;
}
if (n > 0){
double rata_rata = (double)total_usia / n;
}
return 0;
}
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