題目

解題思路

仔細

程式碼

#include <cstdio>
#include <cstdlib>
#include <iostream>
using namespace std;
 
int main()
{
    int a1, a2, a3, a5;
    double a4;
    a1 = a2 = a3 = a4 = a5 = 0;
    int counter[5];
    for (int i = 0; i < 5; ++i) counter[i] = 0;
 
    int n; cin >> n;
 
    for
 
 (int i = 0; i < n; ++i)
    {
        int number; cin >> number;
        switch (number % 5)
        {
        case 0:
            if (number % 2 == 0)
            {
                ++counter[0];
                a1 += number;
            }
            break;
        case 1:
            ++counter[
 
1];
            if (counter[1] % 2 == 1) a2 += number;
            else a2 -= number;
            break;
        case 2:
            ++counter[2];
            ++a3;
            break;
        case 3:
            ++counter[3];
            a4 += number;
            break;
        case 4:
            ++
 
counter[4];
            a5 = (a5 > number ? a5 : number);
            break;
        }
    }
 
    if (counter[0]) cout << a1 << " ";
    else cout << "N ";
 
    if (counter[1]) cout << a2 << " ";
    else cout << "N ";
 
    if (counter[2]) cout << a3 << " ";
    else cout << "N ";
 
    if (counter[3]) printf("%.1lf ", a4 / counter[3]);
    else cout << "N ";
 
    if (counter[4]) cout << a5;
    else cout << "N";
 
    return 0;
}