#include <stdio.h>
int main(void) {
int i,sum;
sum = 0;
for(i = 1;i <= 1000;i ++){
if(i % 10 == 3){
sum = sum+i;
}
}
return 0;
}
I2luY2x1ZGUgPHN0ZGlvLmg+CgppbnQgbWFpbih2b2lkKSB7CglpbnQgaSxzdW07CglzdW0gPSAwOwoJZm9yKGkgPSAxO2kgPD0gMTAwMDtpICsrKXsKCQlpZihpICUgMTAgPT0gMyl7CgkJc3VtID0gc3VtK2k7CgkJfQoJfQoJcHJpbnRmKCJzdW09JWQiLHN1bSk7CglyZXR1cm4gMDsKfQo=