玄关，蒻苟纯模拟不会写优化，dalao教教我

#include <iostream>
#include <cstdio>
#include <cstring>

using namespace std;

int m,q,x;
string s;
int num,cnt,ans;
bool ys=0;
char fh,goto_;

int main(){
	scanf("%d%d",&m,&q);
	cin>>s;
	while (q--){
		scanf("%d",&x);
		ans=0;
		for (int i=0;i<s.length();i++){
			if (s[i]=='x')	continue;
			else if (s[i]>='0' && s[i]<='9'){
				num=0;
				while (s[i]>='0' && s[i]<='9'){
					num*=10;
					num+=s[i]-'0';
					i++;
				}
				ans=num;
				break;
			}
			if (s[i]=='>' || s[i]=='<'){
				num=0;
				fh=s[i];
				i++;
				while (s[i]>='0' && s[i]<='9'){
					num*=10;
					num+=s[i]-'0';
					i++;
				}
				if (!((fh=='>' && x>num) || (fh=='<' && x<num))){
					cnt=0;
					i++;
					while(s[i]!=':' || cnt!=0){
						if (s[i]=='?')	cnt++;
						if (s[i]==':')	cnt--;
						i++;
					}
				}
			}
		}
		printf("%d\n",ans);
	}
	return 0;
}