#include<bits/stdc++.h>
using namespace std;
int a[101][101];
int main() {
	int n, m;
	cin >> n >> m;
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= m; j++) {
			cin >> a[i][j];
			if (a[i][j] != 0 && a[i][j] != 1) {
				cout << "No";
				return 0;
			}
			
		}
	}	
	cout << "Yes";
	return 0;
}

#include<bits/stdc++.h>
using namespace std;
int a[101][101];
int main() {
	int n, m;
	cin >> n >> m;
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= m; j++) {
			cin >> a[i][j];
			if (a[i][j] != 0 && a[i][j] != 1) {
				cout << "No";
				return 0;
			}
			
		}
	}	
	cout << "Yes";
	return 0;
}

#include<bits/stdc++.h>
using namespace std;
int main() {
	int a[20][20],m,n;
	bool f=true;
	cin>>n>>m;
	for(int i=0;i<n;i++){
		for(int j=0;j<m;j++){
			cin>>a[i][j];
			if(a[i][j]!=0&&a[i][j]!=1){
				f=false;
			}
		}
	}
	if(f==true){
		cout<<"Yes"<<endl;
	}else{
		cout<<"No"<<endl;
	}
	return 0;
}