Submission #19234

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Source Code Expand

#include<stdio.h>
#include<iostream>

int main(void){
    char c;
    int s[5]={0};
    double ave=0.0;
    int i,n;
    std::cin>>n;
    for(i=0;i<n;i++){
        std::cin>>c;
        if(c=='A')       s[0]++;
        else if(c=='B')  s[1]++;   
        else if(c=='C')  s[2]++;   
        else if(c=='D')  s[3]++;   
        else if(c=='F')  s[4]++;   
    }
    for(i=0;i<5;i++){
        ave += s[i]*(4-i);
    }
    printf("%.13f",ave/n);
    std::cout<<'\n';
    return 0;
}

Submission Info

Judge Result