Submission #2185978

---

Source Code Expand

#include<iostream>
#include<cstring>
#include<cstdio>
#include<algorithm>
#include<cmath>
#include<set>
#include<bitset>
#include<map>

#define fo(i,a,b) for(int i=a;i<=b;i++)
#define fd(i,a,b) for(int i=a;i>=b;i--)

using namespace std;

typedef long long LL;
typedef double db;

int get(){
	char ch;
	while(ch=getchar(),(ch<'0'||ch>'9')&&ch!='-');
	if (ch=='-'){
		int s=0;
		while(ch=getchar(),ch>='0'&&ch<='9')s=s*10+ch-'0';
		return -s;
	}
	int s=ch-'0';
	while(ch=getchar(),ch>='0'&&ch<='9')s=s*10+ch-'0';
	return s;
}

int main(){
	int n=get(),m=get();
	if (n==1){
		if (m==1)printf("1\n");
		else printf("%d\n",m-2);
		return 0;
	}
	if (m==1)return printf("%d\n",n-2),0;
	printf("%lld\n",1ll*(n-2)*(m-2));
	return 0;
}

Submission Info

Judge Result