#include<stdio.h>
int main() {
    int n;
    if(n == 0) {
        if(n == 0)
        return 0;
        if (n < 0)
        return 1000;
            int a = 1 + minTurns(n - 1);
            int b = 1 + minTurns(n - 2);
            int c = 1 + minTurns(n - 3);
            int min = a;
            if(b < min) min = b;
            if(c < min) min = c;
            return 1 + min;
    }
    int main() {
        int score;
        scanf("%d", &score);
        if(score < 0) {
            printf("Invalid Input");
            return 0;
        }
    }
    int n = score;
    int result = n;
    printf("%d", result);
    return 0;
}