#include <stdio.h> int main() { int Y, k, n; scanf("%d %d %d", &Y, &k, &n); if (Y > n || k > n || k <= 0) { printf("-1"); return 0; } int found = 0; int start = Y; if (start % k != 0) { start += k - start % k; } for (int T = start; T <= n; T += k) { int x = T - Y; if (x...