Submission #645121

#	Time	Username	Problem	Language	Result	Execution time	Memory
645121		Vanilla	Speedrun (RMI21_speedrun)	C++17	29 / 100	41 ms	804 KiB

speedrun

#include <bits/stdc++.h>
#include "speedrun.h"
using namespace std;
const int maxn = 1e3 + 2;
// vector <int> ad [maxn];
// bool ad [maxn][maxn];

void assignHints(int subtask, int N, int A[], int B[]) { /* your solution here */
    int deg [N + 1] = {};
    if (subtask == 1 || N <= 4) {
        setHintLen(N);
        for (int i = 1; i < N; i++){
            setHint(A[i], B[i], 1);
            setHint(B[i], A[i], 1);
        }
    }
    if (subtask == 2) {
        setHintLen(1);
        for (int i = 1; i < N; i++){
            deg[A[i]]++;
            deg[B[i]]++;
        }
        for (int i = 1; i <= N; i++){
            if (deg[i] > 1) setHint(i, 1, 1);
        }

    }
}

void speedrun(int subtask, int N, int start) { /* your solution here */
    if (subtask == 1 || N <= 4) {
        int vis [N + 1] = {};
        auto dfs = [&] (int u, int p = -1, auto&& dfs) -> void {
            for (int i = 1; i <= N; i++){
                if (i == p || i == start) continue;
                if (getHint(i)) {
                    goTo(i);
                    dfs(i, u, dfs);
                }
            }
            if (p != -1) goTo(p);
        };
        dfs(start, -1, dfs);
    }
    if (subtask == 2) {
        if (!getHint(1)) {
            for (int i = 1; i <= N; i++){
                if (goTo(i)) {
                    start = i;
                    break;
                }
            }
        }
        for (int i = 1; i <= N; i++){
            if (i == start) continue;
            goTo(i);
            goTo(start);
        }
    }
}

Compilation message (stderr)

speedrun.cpp: In function 'void speedrun(int, int, int)':
speedrun.cpp:32:13: warning: unused variable 'vis' [-Wunused-variable]
   32 |         int vis [N + 1] = {};
      |             ^~~

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