Submission #645281

#	Time	Username	Problem	Language	Result	Execution time	Memory
645281		Vanilla	Speedrun (RMI21_speedrun)	C++17	100 / 100	232 ms	812 KiB

speedrun

#include <bits/stdc++.h>
#include "speedrun.h"
using namespace std;
const int maxn = 1e3 + 2;
// bool ad [maxn][maxn];
 
void assignHints(int subtask, int N, int A[], int B[]) { /* your solution here */
    vector <int> ad [maxn];
    setHintLen(20);
    for (int i = 1; i < N; i++){
        ad[A[i]].push_back(B[i]);
        ad[B[i]].push_back(A[i]);
    }
    vector <int> euler;
    int l[maxn] = {}, r [maxn] = {}, pr[maxn] = {};
    auto dfs = [&] (int i, int p, auto&& dfs) -> void {
        // cerr << i << " ";
        euler.push_back(i);
        pr[i] = p;
        for (int j: ad[i]) {
            if (j == p) continue;
            dfs(j, i, dfs);
        }
    };
    dfs(1, -1, dfs);
    for (int i = 0; i < N; i++){
        r[euler[i]] = euler[(i + 1) % N];
    }
    for (int i = 1; i <= N; i++){
        for (int b = 0; b <= 9; b++){
            setHint(i, b + 1, (pr[i] & (1 << b)));
            setHint(i, b + 11, (r[i] & (1 << b)));
        }
        // cout << i << " " << l[i] << " " << r[i] << " " << pr[i] << "\n";
        // if (l[i]) cout << i << " " << l[i] << "\n";
        // if (r[i]) cout << i << " " << r[i] << "\n";
    }
}
 
void speedrun(int subtask, int N, int s) { /* your solution here */
    int vis [maxn] = {};
    while (!vis[s]) {
        vis[s] = 1;
        int l = 0, r = 0;
        for (int i = 0; i <= 9; i++){
            l+=((1 << i) * getHint(i + 1));
            r+=((1 << i) * getHint(i + 11));
        }
        // cout << s << " " << l << " " << r << "\n";
        while (!goTo(r)) {
            goTo(l);
            s = l;
            l = 0;
            for (int i = 0; i <= 9; i++){
                l+=((1 << i) * getHint(i + 1));
            }
        }
        s = r;
    }
}

Compilation message (stderr)

speedrun.cpp: In function 'void assignHints(int, int, int*, int*)':
speedrun.cpp:15:9: warning: unused variable 'l' [-Wunused-variable]
   15 |     int l[maxn] = {}, r [maxn] = {}, pr[maxn] = {};
      |         ^

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