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답안 #860629

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
860629 2023-10-13T14:58:23 Z serifefedartar Patkice II (COCI21_patkice2) C++17
55 / 110
 797 ms 437156 KB 
#include <bits/stdc++.h>
using namespace std;
 
#define fast ios::sync_with_stdio(0);cin.tie(0);
#define s second
#define f first
typedef long long ll;
const ll MOD = 1e9 + 7;
const ll LOGN = 18; 
const ll MAXN = 1e5 + 100;

vector<pair<int,pair<int,int>>> graph[2005][2005], rev[2005][2005];
char grid[2005][2005];
int dist[2005][2005];
pair<int,int> s, e;
void change(int row, int col, int nrow, int ncol) {
	if (nrow > row)
		grid[row][col] = 'v';
	else if (nrow < row)
		grid[row][col] = '^';
	else if (ncol < col)
		grid[row][col] = '<';
	else
		grid[row][col] = '>'; 
}

void dfs(int row, int col, int old_row, int old_col, int target) {
	for (auto u : rev[row][col]) {
		int w = u.f;
		int nrow = u.s.f;
		int ncol = u.s.s;
		if (nrow == old_row && ncol == old_col)
			continue;
		if (dist[nrow][ncol] + w == target) {
			change(nrow, ncol, row, col);
			dfs(nrow, ncol, row, col, target - w);
			return ;
		}
	}
}

int r, c;
bool check(int row, int col) {
	if (row >= 0 && col >= 0 && r > row && c > col)
		return true;
	return false;
}

int main() {
	fast
	cin >> r >> c;

	for (int i = 0; i < 2005; i++) {
		for (int j = 0; j < 2005; j++)
			dist[i][j] = 1e8;
	}

	for (int i = 0; i < r; i++) {
		string s;
		cin >> s;
		for (int j = 0; j < c; j++)
			grid[i][j] = s[j]; 
	}

	for (int i = 0; i < r; i++) {
		for (int j = 0; j < c; j++) {
			if (grid[i][j] == '>') {
			    if (check(i, j+1))
				    graph[i][j].push_back({0, {i, j+1}});
				if (check(i+1, j))
				    graph[i][j].push_back({1, {i+1, j}});
				if (check(i, j-1))
				    graph[i][j].push_back({1, {i, j-1}});
				if (check(i-1, j))
					graph[i][j].push_back({1, {i-1, j}});
			} else if (grid[i][j] == '<') {
				if (check(i, j+1))
					graph[i][j].push_back({1, {i, j+1}});
				if (check(i+1, j))
					graph[i][j].push_back({1, {i+1, j}});
				if (check(i, j-1))
					graph[i][j].push_back({0, {i, j-1}});
				if (check(i-1, j))
					graph[i][j].push_back({1, {i-1, j}});
			} else if (grid[i][j] == 'v') {
				if (check(i, j+1))
					graph[i][j].push_back({1, {i, j+1}});
				if (check(i+1, j))
					graph[i][j].push_back({0, {i+1, j}});
				if (check(i, j-1))
					graph[i][j].push_back({1, {i, j-1}});
				if (check(i-1, j))
					graph[i][j].push_back({1, {i-1, j}});
			} else if (grid[i][j] == '^') {
				if (check(i, j+1))
					graph[i][j].push_back({1, {i, j+1}});
				if (check(i+1, j))
					graph[i][j].push_back({1, {i+1, j}});
				if (check(i, j-1))
					graph[i][j].push_back({1, {i, j-1}});
				if (check(i-1, j))
					graph[i][j].push_back({0, {i-1, j}});
			} else if (grid[i][j] == '.') {
				if (check(i, j+1))
					graph[i][j].push_back({1, {i, j+1}});
				if (check(i+1, j))
					graph[i][j].push_back({1, {i+1, j}});
				if (check(i, j-1))
					graph[i][j].push_back({1, {i, j-1}});
				if (check(i-1, j))
					graph[i][j].push_back({1, {i-1, j}});
			} else if (grid[i][j] == 'o') {
				s = {i, j};
				if (check(i, j+1))
					graph[i][j].push_back({0, {i, j+1}});
				if (check(i+1, j))
					graph[i][j].push_back({0, {i+1, j}});
				if (check(i, j-1))
					graph[i][j].push_back({0, {i, j-1}});
				if (check(i-1, j))
					graph[i][j].push_back({0, {i-1, j}});
			} else
				e = {i, j};
		} 
	}

	deque<pair<int,int>> dq;
	dq.push_back(s);
	dist[s.f][s.s] = 0;
	while (!dq.empty()) {
		int row = dq.front().f;
		int col = dq.front().s;
		dq.pop_front();

		for (auto u : graph[row][col]) {
			int w = u.f;
			int nrow = u.s.f;
			int ncol = u.s.s;
			if (dist[nrow][ncol] > w + dist[row][col]) {
				dist[nrow][ncol] = w + dist[row][col];
				if (w == 1)
					dq.push_back({nrow, ncol});
				else
					dq.push_front({nrow, ncol});
			}
		}
	}

	cout << dist[e.f][e.s] << "\n";

	for (int i = 0; i < 2005; i++) {
		for (int j = 0; j < 2005; j++) {
			while (graph[i][j].size()) {
				pair<int,pair<int,int>> here = graph[i][j].back();
				graph[i][j].pop_back();
				//rev[here.s.f][here.s.s].push_back({here.f, {here.s.f, here.s.s}});
			}
		}
	}

	/*
	dfs(e.f, e.s, e.f, e.s, dist[e.f][e.s]);
	grid[s.f][s.s] = 'o';
	for (int i = 0; i < r; i++) 
		cout << grid[i] << "\n";
	*/
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:154:29: warning: variable 'here' set but not used [-Wunused-but-set-variable]
  154 |     pair<int,pair<int,int>> here = graph[i][j].back();
      |                             ^~~~

Subtask #1
15.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Partially correct 61 ms 206672 KB Partially correct
2 Partially correct 51 ms 206864 KB Partially correct
3 Partially correct 62 ms 206680 KB Partially correct
4 Partially correct 53 ms 206676 KB Partially correct
5 Partially correct 51 ms 206844 KB Partially correct

Subtask #2
40.0 / 80.0

# 결과 실행 시간 메모리 Grader output
1 Partially correct 61 ms 206672 KB Partially correct
2 Partially correct 51 ms 206864 KB Partially correct
3 Partially correct 62 ms 206680 KB Partially correct
4 Partially correct 53 ms 206676 KB Partially correct
5 Partially correct 51 ms 206844 KB Partially correct
6 Partially correct 149 ms 240212 KB Partially correct
7 Partially correct 150 ms 242428 KB Partially correct
8 Partially correct 264 ms 289900 KB Partially correct
9 Partially correct 474 ms 344092 KB Partially correct
10 Partially correct 615 ms 406852 KB Partially correct
11 Partially correct 797 ms 437156 KB Partially correct