https://pintia.cn/problem-sets/994805260223102976/problems

#include<iostream>           //未通过全部测试
#include<vector>  

using namespace std ;
vector <int>  v[5]  ;

int main(){
    int A1 = 0 , A2 = 0 , A5 = 0 ;
    double  A4  = 0;    
    int N , num ;
    cin >> N;
    for (int i = 0 ; i < N ; i++){
        cin >> num ;
        v[num%5].push_back(num) ;
    }
    for (int i = 0 ; i < 5 ; i++){
        for (int j = 0 ; j < v[i].size() ; j++){
            if (i == 0 && v[i][j] % 2 == 0)  A1 += v[i][j] ;
            if (i == 1 && j % 2 == 0)  A2 += v[i][j] ;
            if (i == 1 && j % 2 == 1)  A2 -= v[i][j] ;
            if (i == 3 )  A4 += v[i][j] ;
            if (i == 4 && v[i][j] >= A5)  A5 = v[i][j] ;
        }
    }
    double a[5] = {A1, A2 ,v[2].size() , A4 / v[3].size()  , A5} ;
    for (int i = 0 ; i < 5 ; i++){
        if ( i != 0 ) printf(" ");
        if ( a[i] == 0.0)
            printf("N") ;
        else if ( i == 3 )
            printf("%.1f" , a[3]) ;
        else
            printf("%d" , (int)a[i]);
    }
    return 0 ; 
}