#include<bits/stdc++.h>
using namespace std;
int b[1001],a[1001],n,m;
string s;
int main(){
	cin>>n>>m;
	for(int i=1;i<=m;i++){
		cin>>b[i]>>s[i];
		if(s[i]=='M'&&a[b[i]]==0){
			cout<<"Yes"<<endl;
			a[b[i]]=1;
		}
		else cout<<"No"<<endl;
	}
}

莫名RE

样例全过