求大佬帮忙看看

#include<bits/stdc++.h>
using namespace std;
int x[2][9];
int main(){
	char c[10];
	cin>>c+1;
	int len = strlen(c);
	for(int i = 0;i<len;i++){
		int w = i%2;
		int a = c[i]-'0';
		int y = (a%3)?(a%3):3;
		int o = (a-y)/3;
		x[w][o]++;
		x[w][y+2]++;
		if(o+1 == y){
			x[w][6]++;
		}
		if(o+y == 3){
			x[w][7]++;
		}
	}
	for(int i = 0;i<8;i++){
		if(x[0][i] == 3){
			cout<<"xiaoa wins.\n";
			return 0;
		}else if(x[1][i] == 3){
			cout<<"uim wins.\n";
			return 0;
		}
	}	
	cout<<"drew.\n";
	return 0;
}