제출 #9753

#제출 시각아이디문제언어결과실행 시간메모리
9753httraceWiring (kriii2_W)C++98
4 / 4
0 ms1672 KiB
#include <stdio.h>
#include <iostream>
using namespace std;

int main(){
	long long n;
	cin >> n;
	
	if(n%2) cout << n/2;
	else cout << n-1;
}
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