Submission #871569

#	Time	Username	Problem	Language	Result	Execution time	Memory
871569		TAhmed33	Speedrun (RMI21_speedrun)	C++17	8 / 100	9 ms	1280 KiB

speedrun

#include <bits/stdc++.h>
#include "speedrun.h"
using namespace std;
const int m = 31;
vector <int> conv (int x) {
	vector <int> ret;
	for (int i = 9; i >= 0; i--) {
		ret.push_back((x >> i) & 1);
	}
}
void assignHints (int subtask, int n, int a[], int b[]) {
	if (subtask == 3) {
		vector <int> adj[n + 1];
		for (int i = 1; i < n; i++) {
			adj[a[i]].push_back(b[i]);
			adj[b[i]].push_back(a[i]);
		}
		setHintLen(20);
		for (int i = 1; i <= n; i++) {
			auto d = conv(adj[i][0]);
			for (int l = 1; l <= 10; l++) {
				setHint(i, l, d[l - 1]);
			}
			if (adj[i].size() == 1) continue;
			d = conv(adj[i][1]);
			for (int l = 1; l <= 10; l++) {
				setHint(i, l + 10, d[l - 1]);
			}
		}
		return;
	}
	if (subtask == 2) {
		int deg[n + 1] = {};
		if (n == 1) return;
		for (int i = 1; i < n; i++) {
			deg[a[i]]++;
			deg[b[i]]++;
		}
		int pos = 1;
		for (int i = 1; i <= n; i++) {
			if (deg[i] > 1) {
				pos = i;
			}
		}
		setHintLen(1);
		setHint(pos, 1, 1);
		return;
	}
	vector <int> adj[n + 1];
	for (int i = 1; i < n; i++) {
		adj[a[i]].push_back(b[i]);
		adj[b[i]].push_back(a[i]);
	}
	setHintLen(316);
	for (int i = 1; i <= n; i++) {
		if (adj[i].size() > m) continue;
		setHint(i, 316, 1);
		for (int j = 0; j < (int)adj[i].size(); j++) {
			auto x = conv(adj[i][j]);
			for (int l = 10 * j + 1; l <= 10 * j + 10; l++) {
				setHint(i, l, x[l - 10 * j + 1]);
			}	
		}
	}
}
int n;
void dfs (int pos, int par) {
	if (getHint(316) == 1) {
		vector <int> adj;
		for (int j = 0; j <= 30; j++) {
			int x = 0;
			for (int l = 10 * j + 1; l <= 10 * j + 10; l++) {
				x *= 2; x += getHint(l);
			}
			if (x != 0 && x != par) {
				adj.push_back(x);
			}
		}
		for (auto i : adj) {
			goTo(i);
			dfs(i, pos);
			goTo(pos);
		}
		return;
	}
	for (int i = 1; i <= n; i++) {
		if (i == pos || i == par) continue;
		if (goTo(i)) {
			dfs(i, pos);
			goTo(pos);
		}
	}
}
void dfs2 (int pos, int par) {
	int x = 0;
	for (int i = 1; i <= 10; i++) {
		x *= 2; x += getHint(i);
	}
	if (x != 0 && x != par) {
		goTo(x); dfs2(x, pos); goTo(pos);
	}
	x = 0;
	for (int i = 11; i <= 20; i++) {
		x *= 2; x += getHint(i);
	}
	if (x != 0 && x != par) {
		goTo(x); dfs2(x, pos); goTo(pos);
	}
}
void speedrun (int subtask, int N, int start) {
	if (subtask == 3) {
		dfs2(start, -1);
		return;
	}
	if (subtask == 2) {
		n = N;
		if (n == 1) return;
		int x = getHint(1);
		if (x == 1) {
			for (int i = 1; i <= n; i++) {
				if (i == start) continue;
				goTo(i); goTo(start);
			}
			return;
		}
		for (int i = 1; i <= n; i++) {
			if (i == start) continue;
			if (goTo(i)) {
				for (int j = 1; j <= n; j++) {
					if (j == i || j == start) continue;
					goTo(j); goTo(i);
				}
				goTo(start);
				return;
			}
		}
	}
	n = N; dfs(start, -1);	
}

Compilation message (stderr)

speedrun.cpp: In function 'std::vector<int> conv(int)':
speedrun.cpp:10:1: warning: no return statement in function returning non-void [-Wreturn-type]
   10 | }
      | ^

• Subtask 1: 0 / 21
• Subtask 2: 8 / 8
• Subtask 3: 0 / 19
• Subtask 4: 0 / 12
• Subtask 5: 0 / 40