#include <stdio.h>
int main(){
    int N=5;
    int scores[]={75,82,90,69,87};
    int sum=0;
    for(int i=0;i<N;i++){
        sum+=scores[i];
    }
    
    
    float average=(float)*ptr/N;
    printf("%.2f\n",average);
    return 0;
}