파괴되지 않은 건물 C++

https://programmers.co.kr/learn/courses/30/lessons/92344

코딩테스트 연습 - 파괴되지 않은 건물

#include <string>
#include <vector>
#include <cstring>

using namespace std;

int solution(vector<vector<int>> board, vector<vector<int>> skill) {
	int answer = 0;
	int n = board.size();
	int m = board[0].size();
	int tmp[1010][1010];

	memset(tmp, 0, sizeof(tmp));

	for (int i = 0; i < skill.size(); i++) {
		int type = skill[i][0];
		int x1 = skill[i][1];
		int y1 = skill[i][2];
		int x2 = skill[i][3];
		int y2 = skill[i][4];
		int deg = skill[i][5];
		
		if (type == 1) deg = -deg;

		tmp[x1][y1] += deg;
		tmp[x1][y2 + 1] -= deg;
		tmp[x2 + 1][y1] -= deg;
		tmp[x2 + 1][y2 + 1] += deg;
	}

	for (int i = 1; i < n; i++) {
		for (int j = 0; j < m; j++) {
			tmp[i][j] += tmp[i-1][j];
		}
	}

	for (int i = 0; i < n; i++) {
		for (int j = 1; j < m; j++) {
			tmp[i][j] += tmp[i][j-1];
		}
	}

	for (int i = 0; i < n; i++) {
		for (int j = 0; j < m; j++) {
			board[i][j] += tmp[i][j];
			if (board[i][j] > 0) answer++;
		}
	}
	
	return answer;
}