#include <stdio.h>
int main() {
int a, b;
int sum = 0;
int i;
// 小さい方から大きい方へループさせるために並び替え
int min = (a < b) ? a : b;
int max = (a > b) ? a : b;
i = min;
while (i <= max) {
sum += i;
i++;
}
return 0;
}
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