#include <iostream>
#include <fstream>

std::ifstream fin("cmmdc.in");
std::ofstream fout("cmmdc.out");
int main() {
	int n, m;
	fin >> n >> m;
	int Flip[20][20];
	int suma = 0;

	for (int i = 0; i < n; i++) {
		for (int j = 0; j < m; j++) {
			fin >> Flip[i][j] ;
			
		}
	}

	for (int i = 0; i < n; i++) {
		for (int j = 0; j < m; j++) {
			if (Flip[i][j] < 1)
				Flip[i][j] = 0;
			 suma += Flip[i][j];
		}
	}
	fout << suma;
	
	return 0;
}