0pts

#include <bits/stdc++.h>
#include <iostream>
#include <time.h>
#include <stdlib.h>
#include <cmath>
#include <cstdlib>
#include <cstdio>
#include <stdio.h>
#include <algorithm>
#include <string>
#include <string.h>
#include <math.h>
#include <stack>
#include <queue>
#include <vector>
#include <numeric>

using namespace std;
typedef long long ll;

int n, m;
int a[1010][1010];
int ans = 0;
char s;

signed main() {
	scanf ("%d%d\n", &n, &m);
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= m; j++) {
			scanf ("%c", &s);
			a[i][j] = s - '0';
		}
		scanf ("%*c");
	}
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= m; j++) {
			if (a[i][j] > 0) {
				ans++;
			}
		}
	}
	int tot1 = 0, tot2 = 0;
	for (int j = 1; j <= m; j++) {
		tot1 += a[1][j];
		for (int i = 2; i <= n; i++) {
			if (a[i][j] > a[i - 1][j]) {
				tot1 += (a[i][j] - a[i - 1][j]);
			}
		}
	}
	for (int i = 1; i <= n; i++) {
		tot2 += a[i][1];
		for (int j = 2; j <= m; j++) {
			if (a[i][j] > a[i][j - 1]) {
				tot2 += (a[i][j] - a[i][j - 1]);
			}
		}
	}
	cout << (ans + tot1 + tot2) * 2;
	return 0;
}

题目