#include <stdio.h>
int main(void) {
int a=1, sum=0;
while(a<=100)
{
if(a%3 != 0 && a%5 != 0)
{
sum = sum + a;
}
a++;
}
printf("1から100のうち、3の倍数でもなく、5の倍数でもない数字の和は%dである",sum
);
return 0;
}
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