#include<iostream>
using namespace std;
int main(){
	freopen("copy.in","r",stdin);
	freopen("copy.out","w",stdout);
	ios::sync_with_stdio(false);
	int n,m,z,ans=0,l1=0,l2=0;
	cin>>n>>m;
	char a[n+1][m+1];
	for(int i=1;i<=n;i++)
		for(int j=1;j<=m;j++){
			cin>>a[i][j];
			if(a[i][j]=='(')
				l1++;
			else
				l2++;
		}
	if(l1==n*m || l2==n*m){
		cout<<0;
		return 0;
	}
	else if(l1==n*m-1 || l2==n*m-1){
		cout<<1;
		return 0;
	}
	z=n+m-1;
	for(int i=1;i<z;i+=2)
		ans+=i;
	cout<<ans;
	return 0;
}