Submission #954980

#	Time	Username	Problem	Language	Result	Execution time	Memory
954980		Halym2007	Robots (APIO13_robots)	C++17	30 / 100	1 ms	604 KiB

robots

#include <bits/stdc++.h>
using namespace std;
#define ff first
#define ss second
// yokary saga asak cepe
//   0     1    2    3
const int N = 15;
int aa[] = {-1, 0, 1, 0};
int bb[] = {0, 1, 0, -1};
pair <int, int> a1, b1;
int n, m, k, dis[N][N], dis1[N][N];
bool dur[N][N][4], vis[N][N], vis1[N][N];
char a[N][N];

bool durmalymy (int x, int y) {
	if (min (x, y) < 1 or x > n or y > m or a[x][y] == 'x') return 1;
	return 0;
}

pair <int, int> ugur (int x, int y, int val) {
	for (int i = 1; i <= n; ++i) {
		for (int j = 1; j <= m; ++j) {
			for (int k = 0; k < 4; ++k) {
				dur[i][j][k] = 0;
			} 
		}
	}
//	memset (dur, 0, sizeof(dur));
	while (1) {
		if (a[x][y] == 'A') {
			val--;
		}
		else if (a[x][y] == 'C') {
			val++;
		}
 		if (dur[x][y][val]) {
			x = y = 0;
			break;
		}
		val += 4;val %= 4;
		dur[x][y][val] = 1;
//		cout << "tr : ->> " << x << " " << y << " " << val << " " << x + aa[val] << " " << y + bb[val] << "\n";
		if (durmalymy (x + aa[val], y + bb[val])) break;
		x += aa[val];y += bb[val];
	}
//	cout << x  
	return {x, y};
}


int main () {
//	freopen ("input.txt", "r", stdin);
	cin >> k >> m >> n;
	assert (k == 2);
//	cout << "sal ";
	for (int i = 1; i <= n; ++i) {
		for (int j = 1; j <= m; ++j) {
			cin >> a[i][j];
			if (a[i][j] == '1') {
				a1 = {i, j};
			}
			else if (a[i][j] == '2') {
				b1 = {i, j};
			}
			dis[i][j] = dis1[i][j] = 1e9;
		}
	}
//	auto x = ugur (4, 1, 0);
//	cout << x.ff << " " << x.ss;
//	return 0;
//	cout << "sal2 ";
	queue <pair <int, int>> q;
	q.push({a1.ff, a1.ss});
	dis[a1.ff][a1.ss] = 0;
	vis[0][0] = vis[a1.ff][a1.ss] = 1;
	while (!q.empty()) {
		auto op = q.front();
		q.pop();
//		cout << ": " << op.ff << " " << op.ss << "\n";
		for (int i = 0; i < 4; ++i) {
			auto x = ugur (op.ff, op.ss, i);
//			cout << "dur : " << x.ff << " " << x.ss << "\n";
			if (vis[x.ff][x.ss]) continue;
			q.push({x.ff, x.ss});
			dis[x.ff][x.ss] = dis[op.ff][op.ss] + 1;
			vis[x.ff][x.ss] = 1;
		}
//		return 0;
	}
	
//	cout << "sal1 ";
	
	
	
	q.push({b1.ff, b1.ss});
	dis1[b1.ff][b1.ss] = 0;
	vis1[0][0] = vis1[b1.ff][b1.ss] = 1;
//	cout << vis1[1][]
	while (!q.empty()) {
		auto op = q.front();
		q.pop();
//		cout << ": " << op.ff << " " << op.ss << "\n";
		for (int i = 0; i < 4; ++i) {
			auto x = ugur (op.ff, op.ss, i);
//			cout << i << " " << "dur : -> " << x.ff << " " << x.ss << " ";
			if (vis1[x.ff][x.ss]) {
				continue;
			}
//			cout << "\n";
			q.push({x.ff, x.ss});
			dis1[x.ff][x.ss] = dis1[op.ff][op.ss] + 1;
			vis1[x.ff][x.ss] = 1;
		}
	}
//	cout << "cyk " << dis[1][1] << " " << dis1[1][1] << "\n";
//	
//	return 0;
	int jog = 1e9;
	for (int i = 1; i <= n; ++i) {
		for (int j = 1; j <= m; ++j) {
			jog = min (jog, dis[i][j] + dis1[i][j]);
		}
	}
	if (jog == 1e9) jog = -1;
	cout << jog;
}

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 0 / 30
• Subtask 4: 0 / 40