#define _CRT_SECURE_NO_WARNINGS

#include <stdio.h>
#define N_MAX 16
#define FIN "flip.in"
#define FOUT "flip.out"


void readData(void);
void solve(void);
void printResult(void);

int a[N_MAX][N_MAX],n,m,result;
FILE * fin, *fout;

int main()
{
	readData();
	solve();
	printResult();

	return 0;
}

void solve(void)
{
	int i,j;
	result = 0;
	for(i = 0; i < n; ++i)
		for(j = 0; j < m; ++j)
			result += a[i][j];
}

void printResult(void)
{
	
	fout = fopen(FOUT,"w");
	
	/*
	int i,j;
	for(i = 0; i < n; ++i){
		for(j = 0; j < m; ++j)
			fprintf(fout,"%d ",a[i][j]);
		fprintf(fout,"\n");
	}
	*/

	fprintf(fout,"%d\n",result);

	fclose(fin);
	fclose(fout);
}

void readData(void)
{
	int i,j;
	fin = fopen(FIN,"r");
	if(NULL != fin){
		fscanf(fin,"%d %d",&n,&m);
		for(i = 0; i < n; ++i)
			for(j = 0; j < m; ++j)
				fscanf(fin,"%d",&a[i][j]);
	}
}