#include <iostream>
#include <algorithm>
 
using namespace std;
 
int main() {
 
    string texts[4] = { "C", "C++", "Java", "Python" };
    int size = sizeof(texts) / sizeof(texts[0]);
    sort(texts, texts + size);
 
    string target = "C++";
    if (binary_search(texts, texts + 4, target)) {
        string* idx = lower_bound(texts, texts + 4, target);
        cout << (idx - texts) << endl;
    } else {
        cout << "Not found." << endl;
    }
 
    return 0;
 
}
 
 

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