求助！！此代码为什么 RE（只要告诉我为什么RE就好啦）

#include<bits/stdc++.h>
using namespace std;
const int N = 1e6+5;
char s[N], t[N];

int main(){
	int T;
	cin >> T;
	while(T--){
		memset(s,'\0',sizeof(s));
		memset(t,'\0',sizeof(t));
		cin >> s; cin >> t;
		int ls = strlen(s), lt = strlen(t);
		if(lt != ls-2){
			if(!T){
				cout << 0;
			} else cout << 0 << endl;
			continue;
		}
		int j = 0, cnt = 0;
		for(int i = 0; i < ls; i++){
			while(s[i] != t[j])
				i++, cnt++;
			if(cnt >= 2){
				break;
			}
			j++;
		}
		if(cnt != 2){
			if(!T){
				cout << 0;
			} else cout << 0 << endl;
			continue;
		} else {
			if(!T){
				cout << 1;
			} else cout << 1 << endl;
			continue;
		}
	}
	return 0;
}