Submission #1129060

#	Time	Username	Problem	Language	Result	Execution time	Memory
1129060		jhwest2	Speedrun (RMI21_speedrun)	C++20	0 / 100	80 ms	500 KiB

speedrun

#include "speedrun.h"
#include <bits/stdc++.h>
#define ff first
#define ss second
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

int par[1 << 10];
vector<int> gph[1 << 10];
vector<int> vec;

void dfs(int p, int v) {
	vec.push_back(v);
	for (int x : gph[v]) if (p != x) {
		par[x] = v;
		dfs(v, x);
	}
}
void assignHints(int subtask, int n, int A[], int B[]) {
	for (int i = 1; i < n; i++) {
		int u = A[i];
		int v = B[i];
		gph[u].push_back(v);
		gph[v].push_back(u);
	}
	dfs(0, 1);
	vec.push_back(n + 1);
	setHintLen(20);
	for (int i = 1; i <= n; i++) {
		int u = vec[i - 1];
		int v = vec[i];
		for (int j = 0; j < 10; j++) {
			setHint(u, 1 + j, (v >> j & 1));
		}
	}
	for (int i = 2; i <= n; i++) {
		int u = i;
		int v = par[i];
		for (int j = 0; j < 10; j++) {
			setHint(u, 11 + j, (v >> j & 1));
		}
	}
}

int N[1 << 10], P[1 << 10];
bool chc[1 << 10];

void speedrun(int subtask, int n, int v) {
	int to = 0, cnt = n;
	while (cnt > 0) {
		for (int j = 0; j < 10; j++) N[v] |= getHint(1 + j) << j;
		for (int j = 0; j < 10; j++) P[v] |= getHint(11 + j) << j;
		if (!chc[v]) {
			chc[v] = true;
			--cnt;
		}
		if (to == n + 1) {
			if (v == 1) {
				to = N[v];
			}
			else {
				goTo(P[v]);
				v = P[v];
				continue;
			}
		}
		if (to == 0) {
			to = N[v];
		}

		bool f = goTo(to);
		if (f) {
			v = to;
			to = 0;
		}
		else {
			f = goTo(P[v]);
			v = P[v];
		}
	}
}

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