题解 | #挑7#
挑7
http://www.nowcoder.com/practice/ba241b85371c409ea01ac0aa1a8d957b
import java.util.Scanner;
public class Main {public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
while (scanner.hasNextInt()){
int n = scanner.nextInt();
int count =0;
for (int i = 1; i <= n; i++) {
if (i%7==0||String.valueOf(i).contains("7"))
count++;
}
System.out.println(count);
}
}
}
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