#include <iostream>
#include <string>
#include <cstdio >
using namespace std;
int main()
{
string s = "AB";
int x = 0;
sscanf(s.c_str(), "%x", &x);
cout << hex << x << endl;
}
I2luY2x1ZGUgPGlvc3RyZWFtPgojaW5jbHVkZSA8c3RyaW5nPgojaW5jbHVkZSA8Y3N0ZGlvID4KdXNpbmcgbmFtZXNwYWNlIHN0ZDsKCmludCBtYWluKCkKewogICAgc3RyaW5nIHMgPSAiQUIiOwogICAgaW50IHggPSAwOwogICAgc3NjYW5mKHMuY19zdHIoKSwgIiV4IiwgJngpOwogICAgY291dCA8PCBoZXggPDwgeCA8PCBlbmRsOwp9Cg==