题解 | BFS

#include <stdio.h>
#include <string.h>
int main(int argc,char *argv[])
{
    int remoc=0;
    char S[101]={0};
    scanf("%s",S);
    for(int i=0;S[i]!='\0';i++){
        if((S[i]=='b' || S[i]=='B')&& (S[i+1]=='o' || S[i+1]=='O')
        && (S[i+2]=='b'|| S[i+2]=='B')){
            printf("%d\n",i);
            remoc=1;
            break;
        }
    }
    if(remoc==0){
        printf("-1\n");
    }
    return 0;
}