View Code of Problem 3696

#include<iostream> 
using namespace std;
int main() {
	int N, b;
	//0 1 5 6 多少次方都不变(0次方除外)
	//arr记录0-9 2次方开始的规律 
	int arr[10][4]={0,0,0,0,
					1,1,1,1,
					6,2,4,8,
					1,3,9,7,
					6,4,6,4,
					5,5,5,5,
					6,6,6,6,
					1,7,9,3,
					6,8,4,2,
					1,9,1,9					
					};
	while(scanf("%d",&N)) {
		if(N==0) printf("1\n");
		else {
			b=N%10;
			if(b==0||b==1||b==5||b==6) printf("%d\n",,arr[b][0])
			else if(b==2||b==3||b==7||b==8) printf("%d\n",arr[b][N%4]);
			else printf("%d\n",arr[b][N%2]);
		}
	}
}
/*
Main.cc: In function 'int main()':
Main.cc:22:45: error: expected primary-expression before ',' token
    if(b==0||b==1||b==5||b==6) printf("%d\n",,arr[b][0])
                                             ^
*/