来个大佬请救一下我的代码 悲伤

全wa，0分萌新求助

#include<bits/stdc++.h>
using namespace std;
int n;
int ans;

int main(){
	cin>>n;
	for(int i=0;i<n;i++){
		string a;
		string b;
		string c;
		string d;
		cin>>a;
		if(a[0]=='y'){
			cin>>b;
			if(b[0]=='y'){
				cin>>c;
				if(c=="ding"){
					cin>>d;
					if(d=="zhen"){
						cout<<"No"<<endl;
					}
					else
						cout<<"No"<<endl;
				}
				else
					cout<<"No"<<endl;
			}
			else
				cout<<"No"<<endl;
		}
	}
	return 0;
}

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