#include <iostream>
using namespace std;

int main() {
    char str[101];
    int recorder = 0;
    cin.getline(str, 101);
    recorder = strlen(str);
    cout << str[recorder / 2];
}

/sandbox/1/a.cpp:9:11: error: use of undeclared identifier 'strlen'
        recorder=strlen(str);
                 ^
1 error generated.