CODEFORCES problem 281/A Word Capitalization

Problem link (Click here)

#include <iostream>
#include <cstdio>
#include <string>

using namespace std;

int main()
{
    string stone ;
    int i=0;
    cin >> stone;
    stone[i]=toupper(stone[i]);

    cout << stone << endl;
    return 0;
}