依次判断即可

#include<bits/stdc++.h>
#define int long long
using namespace std;
signed main(){
	int n,d;
	cin>>n>>d;
	while(n){
		if(d==n%10){
			cout<<"true";
			return 0;
		}n/=10;
	}
	cout<<"false";
	return 0;
}