题解 | #与7无关的数#
与7无关的数
https://www.nowcoder.com/practice/776d401bf86d446fa783f0bef7d3c096
#include <stdio.h>
#include <stdlib.h>
int releOrNot(int x){
if(x%7==0){
return -1;
}
int a=x%10;
int b=x/10%10;
int c=x/100%10;
if(a==7||b==7||c==7){
return -1;
}
return 0;
}
int main()
{
int n;
scanf("%d",&n);
int m=0;
for(int i=0;i<=n;i++){
if(releOrNot(i)==0){
m+=i*i;
}
}printf("%d\n",m);
return 0;
}
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