题解 | 小红的正整数构造
小红的正整数构造
https://www.nowcoder.com/practice/7aa37cbc28034fe5af562ec7e44d1e76
#include <stdio.h>
int main()
{
int l = 0;
int r = 0;
int x = 0;
scanf("%d %d %d", &l, &r, &x);
int k = (l + x - 1) / x;
if (x*k <= r)
printf("%d", x*k);
if (x*k > r)
printf("-1");
return 0;
}