ZOJ-2829

反正N最大才100000，暴力枚举下就行了。。方法好土啊

#include<stdio.h>int main(){    int index = 0, num = 3, a[100000];    while (index < 100000)    {        if (num % 3 == 0 || num % 5 == 0)            a[index++] = num;        num++;    }    while (scanf("%d", &num) != EOF)        printf("%d\n", a[num - 1]);    return 0;}