제출 #9743

#제출 시각아이디문제언어결과실행 시간메모리
9743YoonWiring (kriii2_W)C++98
1 / 4
0 ms1088 KiB
#include <stdio.h>
long long int N,Cnt;
int main()
{
	int i;
	scanf("%I64d",&N);
	if(N%2==0)Cnt=N-1;
	else Cnt=(N-1)/2;
	printf("%I64d\n",Cnt);
	return 0;
}
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