#define _CRT_SECURE_NO_WARNINGS#include <stdio.h>int main(){ int n,a4; int a1 = 0, a2 = 1, a3 = 1; scanf("%d", &n); if (n == 1) printf("%d", a1); else if (n == 2) printf("%d", a2); else if (n == 3) printf("%d", a3); else { for (int i = 4; i <= n; ...