Submission #543936

#	Time	Username	Problem	Language	Result	Execution time	Memory
543936		eecs	Speedrun (RMI21_speedrun)	C++17	100 / 100	185 ms	884 KiB

speedrun

#include "speedrun.h"
#include <bits/stdc++.h>
using namespace std;

void assignHints(int, int n, int *U, int *V) {
    setHintLen(20);
    vector<vector<int>> G(n + 1);
    for (int i = 1; i < n; i++) {
        G[U[i]].push_back(V[i]), G[V[i]].push_back(U[i]);
    }
    int lst = 0;
    function<void(int, int)> dfs = [&](int u, int fa) {
        if (lst) for (int i = 0; i < 10; i++) setHint(lst, i + 1, u >> i & 1);
        lst = u;
        for (int i = 0; i < 10; i++) setHint(u, i + 11, fa >> i & 1);
        for (int v : G[u]) if (v ^ fa) dfs(v, u);
    };
    dfs(1, 0);
    setHint(lst, 1, 1);
}

void speedrun(int, int n, int s) {
    while (1) {
        int fa = 0;
        for (int i = 0; i < 10; i++) if (getHint(i + 1)) fa |= 1 << i;
        if (s == fa) break;
        while (!goTo(fa)) {
            int nxt = 0;
            for (int i = 0; i < 10; i++) if (getHint(i + 11)) nxt |= 1 << i;
            goTo(nxt);
        }
    }
}

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