int main()
{
int S;
S = 3800;
int h = S / (60 * 60);//hは時間
int m = (S % (60 * 60)) / 60;//mは分
int s = (S % (60 * 60)) % 60;//sは秒
printf("%d:%d:%d\n", h
, m
, s
); }
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