题解 | #守形数#

#include <iostream>
#include<sstream>
#include<string>
using namespace std;
int main(int argc, char** argv) {
	
	int a; int b;int c;int d;
	string s1;
	string s2;
	stringstream ss,ss1;
	cin>>a;
	b=a*a;
	ss<<b;
	ss>>s1;
	ss1<<a;
	ss1>>s2;
	c=s1.length()-s2.length();
	if(s1.find(s2,c)!=s1.npos){
		cout<<"Yes!"<<endl;
	}
	else
		cout<<"No!"<<endl;
	
	return 0;
	
	
}