#include <iostream>
#include <string>
#include <bitset>
using namespace std;


//ifstream cin("input01.txt");
//ofstream cout("out01.txt");
int n,m;
int fld[1111][1111];
string st;
bitset<1111> bt[1111];
int main(){
	cin>>n>>m;
	for(int i=0;i<n;i++){
		cin>>st;
		for(int j=0;j<m;j++){
			fld[i+1][j+1]=st[j]-'0';
		}
	}
	for(int i=1;i<=n;i++){
		for(int j=1;j<=m;j++){
			fld[i][j]+=fld[i][j-1];
		}
	}
	for(int i=1;i<=n;i++){
		for(int j=1;j<=m;j++){
			fld[i][j]+=fld[i-1][j];
			fld[i][j]%=2;
			bt[i][j]=fld[i][j];
		}
	}
	long long sol=0;
	for(int i=0;i<n;i++){
		for(int j=i+1;j<=n;j++){
			int c= ( bt[i] ^ bt[j]).count();
			int d= m+1-c;
			sol += c*1ll*(c-1)/2;
			sol += d*1ll*(d-1)/2;
		}
	}
	cout<<sol<<endl;
}