PAT-1012 数字分类

#include 
#include 
#include 
#include 
#include 
using namespace std;

#define MAX 1000+10
int main()
{
    //freopen("in.txt", "r", stdin);
    //freopen("out.txt", "w", stdout);
    int n = 0, a[MAX];
    int o1 = 0, o2 = 0, o3 = 0, o5 = 0;
    int f1 = 0, f2 = 0, f3 = 0, f4 = 0, f5 = 0;
    int f = 0, j = 0;
    double o4 = 0.0;
    cin >> n;
    for (int i = 0; i < n; i++)
        cin >> a[i];
    for (int i = 0; i < n; i++)
    {
        //o1
        if (a[i]%5 == 0 && (a[i]&1)==0)
        {
            o1 += a[i];
            f1 = 1;
        }

        //o2
        if (a[i]%5==1)
        {
            f2 = 1;
            if (f == 0)
            {
                o2 += a[i];
                f = 1;
            }
            else
            {
                o2 -= a[i];
                f = 0;
            }
        }

        //o3
        if (a[i]%5 == 2)
        {
            f3 = 1;
            o3++;
        }

        //o4
        if (a[i]%5 == 3)
        {
            f4 = 1;
            o4 += a[i];
            j++;
        }

        //o5
        if (a[i]%5 == 4 && a[i] > o5)
        {
            f5 = 1;
            o5 = a[i];
        }
    }

    if (f1 == 1)
        cout << o1 << " ";
    else
        cout << "N" << " ";
    if (f2 == 1)
        cout << o2 << " ";
    else
        cout << "N" << " ";
    if (f3 == 1)
        cout << o3 << " ";
    else
        cout << "N" << " ";
    if (f4 == 1)
        cout << setprecision(1)  << fixed << o4/j << " ";
    else
        cout << "N" << " ";
    if (f5 == 1)
        cout << o5;
    else
        cout << "N";
    return 0;
}