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userId_undefined

绝区零YYDS

倔强青铜

2023-08-17 10:08:05

发布于：广东

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#include<iostream>
using namespace std;
string s;
long long n,l;
int main(){
    freopen("rotate.in","r",stdin);
    freopen("rotate.out","w",stdout);
    cin>>s>>n;
    l=s.size();
    while(l<n)l*=2;
    l/=2;
    while(n>s.size()){
		if(n==l)n/=2;
        else if(n-l>1)n=n-l-1;
        else if(n-l==1)n=1;
        l/=2;
    }
    cout<<s[n-1];
    fclose(stdin);
    fclose(stdout);
    return 0;
}
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