#include <iostream>
using namespace std;

short table[8][1024 * 4];

int main(void) {
	int n;

	for(int i = 0; i < 1024 * 8; i++)
		table[0][i] = 1;

	for(int i = 1; i < 4; i++) {
		for(int j = 0; j < 1024 * 4; j++) {
			table[i][j] = 0;
			for(int k = 0; k <= j; k++) {
				table[i][j] += table[i - 1][j - k];
			}
		}
	}

	while(cin >> n) {
		cout << table[3][n] << endl;
	}
}