function Main(input) {
    let N = input.replace("\n", "");
    let ans = 0;
    for (let t = 0; t <= N / 5; t++) {
        for (let g = 0; g <= t; g++) {
            for (let p = 0; p <= N / 3; p++) {
                if (t * 5 + g * 2 + p * 3 == N) ans++;
            }
        }
    }
    console.log(ans.toString());
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));