比赛 2025暑期集训第8场 评测结果 AAAAAAAAAA
题目名称 引水入城 最终得分 100
用户昵称 OTTF 运行时间 0.799 s
代码语言 C++ 内存使用 5.42 MiB
提交时间 2025-08-13 09:05:10
显示代码纯文本

#include <cstdio>
#include <cstring>
#include <iostream>
#include <utility>
#include <vector>

using namespace std;

int n;
int m;
int nums[514][514];
int vis[514][514];
int xc[4] = {1, -1, 0, 0};
int yc[4] = {0, 0, 1, -1};
pair<int, int> lines[514];

void dfs (int start, int x, int y) {
	if (vis[x][y] == start) {
		return;
	}
	vis[x][y] = start;
	if (x == n) {
		if (lines[start].first == 0 || lines[start].first > y) {
			lines[start].first = y;
		}
		if (lines[start].second == 0 || lines[start].second < y) {
			lines[start].second = y;
		}
	}
	for (int i = 0; i < 4; i++) {
		int xx = x + xc[i];
		int yy = y + yc[i];
		if (nums[xx][yy] < nums[x][y]) {
			dfs (start, xx, yy);
		}
	}
}

int main () {
	
	freopen ("flow.in", "r", stdin);
	freopen ("flow.out", "w", stdout);

	cin >> n >> m;
	memset (nums, 0x3f, sizeof (nums));
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= m; j++) {
			cin >> nums[i][j];
		}
	}

	for (int i = 1; i <= m; i++) {
		dfs (i, 1, i);
	}

	int cc = 0;
	for (int i = 1; i <= m; i++) {
		cc += !vis[n][i];
	}

	if (cc) {
		cout << 0 << endl;
		cout << cc << endl;
		return 0;
	}

	cc = 0;
	int l = 1;
	int r;

	while (l <= m) {
		r = 0;
		for (int i = 1; i <= m; i++) {
			if (lines[i].first <= l && lines[i].second > r) {
				r = lines[i].second;
			}
		}
		l = r + 1;
		cc++;
	}

	cout << 1 << endl;
	cout << cc << endl;
	
	return 0;
}