题解 | #挑7#
挑7
http://www.nowcoder.com/practice/ba241b85371c409ea01ac0aa1a8d957b
思路：循环判断i是7的倍数，或者转成String后包含7，计数+1
import java.util.*;
public class SelectSeven {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
while (sc.hasNextInt()) {
int a = sc.nextInt();
int cnt = 0;
for (int i = 1; i <= a; i++) {
if (i % 7 == 0 || (i + "").contains("7")) {
System.out.println(i);
cnt++;
}
}
System.out.println(cnt);
}
}
}
