#include <stdio.h> int jump_step(int a) { int i, b, c, d; if (a == 1) return 1; if (a == 2) return 2; b = 1; // -2 c = 2; // -1 for (i = 2; i < a; i++) { d = b + c; b = c; c = d; } return d; } int main(int argc, char *argv[]) { int num; while (scanf("%d", &num) == EOF || num &...