1012 數字分類 (20分)

Github代碼（不全，更新中）

分析：按題目給的條件，一步步來就好，不難，要仔細

#include <iostream>
#include <cstdio>
using namespace std;

int main()
{
    int N, num;
    int A1 = 0, A2 = 0, A3 = 0, A5 = 0;
    double A4 = 0;
    int time[8] = {0};
    cin>>N;
    for(int i=0; i<N; i++){
        cin>>num;
        switch(num % 5){
        case 0:
            if(num % 10 == 0){
                A1 += num;
                time[1]++;
            }
            break;
        case 1:
            A2 += (time[2] % 2 == 0)?num:(num*(-1));
            time[2]++;
            break;
        case 2:
            A3++;
            time[3]++;
            break;
        case 3:
            A4 += num;
            time[4]++;
            break;
        case 4:
            A5 = A5>=num?A5:num;
            time[5]++;
            break;
        }
    }
    if(time[1])
        cout<<A1<<" ";
    else
        cout<<"N ";

    if(time[2])
        cout<<A2<<" ";
    else
        cout<<"N ";

    if(time[3])
        cout<<A3<<" ";
    else
        cout<<"N ";
    if(time[4])
        printf("%.1f ", A4/(time[4]*1.0));
    else
        cout<<"N ";
    if(time[5])
        cout<<A5<<"\n";
    else
        cout<<"N\n";
    return 0;
}