ammdyc @ 2022-10-14 10:33:12
#include<bits/stdc++.h>
using namespace std;
long long n,m;
string s;
int main(){
cin>>s;
cin>>n;
for(long long i=1;i<=s.length();i++){
if(s[i]=='3'){
m++;
}
}
if(m==n){
cout<<"YES";
}
else{
cout<<"NO";
}
return 0;
}
by xingke233 @ 2022-10-14 10:40:15
@ammdyc
string 下标从0开始
by ammdyc @ 2022-10-14 10:43:25
@@xingke233 谢谢