题解 | BFS
BFS
https://www.nowcoder.com/practice/22da7730da5d4a129a188ba24d22f2bf
#include<bits/stdc++.h>
using namespace std;
int main(){
string s;
cin>>s;
transform(s.begin(),s.end(),s.begin(),::toupper);//或者tolower
if(s.find("BOB")==-1){
cout<<"-1"<<endl;
}else{
cout<<s.find("BOB")<<endl;
}
return 0;
}
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