#include <string>
#include <iostream>
#include <vector>

const int N = 200;

int main() {
    std::vector<std::string> s;
    for (int i = 0; i < N; ++i) {
        s.push_back("");
        for (int j = 0; j < N; ++j) {
            s[i].push_back('a');
        }
    }
    int k = 0;
    for (int t = 0; t < 200; ++t) {
        for (int i = 0; i < N; ++i) {
            for (int j = 0; j < N; ++j) {
                if (s[i] == s[j]) {
                    ++k;
                }
            }
        }
    }
    std::cout << k << std::endl;
    return 0;
}