#include <stdio.h>
int main(void)
{
int x;
for(x = 0; x < 20; x++) {
if(x % 3 == 0 && x % 5 == 0) {
}
else if(x % 3 == 0) {
}
else if(x % 5 == 0) {
}
else {
}
}
return 0;
}
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