1012. 数字分类 (20)

#include<stdio.h>
#include<stdlib.h>
	int main(){
		int A_f[2][5] = {{0},{0}};
		int N;
		int zqd;
		int cnt2 = 0;
		int cnt1 = 1;
		scanf("%d",&N);
		double sum = 0;
		A_f[0][4] = -1;
		while (N--){
			scanf("%d",&zqd);
			switch (zqd % 5){
				case 0:
					if (zqd % 2 == 0){
						A_f[0][0] += zqd;
						A_f[1][0] = 1;
					}
					break;
				case 1:
					A_f[0][1] += zqd * cnt1;
					A_f[1][1] = 1;
					cnt1 = -cnt1;
					break;
				case 2:
					A_f[0][2]++;
					A_f[1][2] = 1;
					break;
				case 3:
					sum += zqd;
					cnt2++;
					A_f[1][3] = 1;
					break;
				case 4:
					if (zqd > A_f[0][4]){
						A_f[0][4] = zqd;
						A_f[1][4] = 1;
					}
					break;
			}
		}
		if (A_f[1][0]){
			printf("%d ",A_f[0][0]);
		}else{
			printf("N ");
		}
		if (A_f[1][1]){
			printf("%d ",A_f[0][1]);
		}else{
			printf("N ");
		}
		if (A_f[1][2]){
			printf("%d ",A_f[0][2]);
		}else{
			printf("N ");
		}
		if (A_f[1][3]){
			printf("%.1f ",sum * 1.0 / cnt2);
		}else{
			printf("N ");
		}
		if (A_f[1][4]){
			printf("%d",A_f[0][4]);
		}else{
			printf("N");
		}
		return 0;
	}