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Submission #536989

# Submission time Handle Problem Language Result Execution time Memory
536989 2022-03-14T08:52:01 Z siewjh Speedrun (RMI21_speedrun) C++17
21 / 100
 47 ms 732 KB 
#include "speedrun.h"
#include <vector>
using namespace std;

void assignHints(int subtask, int N, int A[], int B[]) {
    if (subtask == 1){
        setHintLen(N);
        for (int i = 1; i < N; i++){
            setHint(A[i], B[i], 1);
            setHint(B[i], A[i], 1);
        }
    }
    else if (subtask == 2){
        setHintLen(20);
        vector<int> occur(N + 1, 0);
        for (int i = 1; i < N; i++){
            occur[A[i]]++;
            occur[B[i]]++;
        }
        int centre = 1; // when N is 2
        for (int i = 1; i <= N; i++)
            if (occur[i] > 1){
                centre = i;
                break;
            }
        for (int k = 0; k <= 19; k++)
            if (centre & (1 << k))
                for (int i = 1; i <= N; i++)
                    setHint(i, k, 1);
    }
}

void dfs(int curr, int par, int N){
    for (int i = 1; i <= N; i++){
        if (!getHint(i)) continue;
        if (i == par) continue;
        goTo(i);
        dfs(i, curr, N);
    }
    if (par != -1) goTo(par);
}

void speedrun(int subtask, int N, int start) {
    if (subtask == 1) dfs(start, -1, N);
    else if (subtask == 2){
        int centre = 0;
        for (int i = 0; i <= 19; i++)
            if (getHint(i))
                centre += (1 << i);
        if (start != centre) goTo(centre);
        for (int i = 1; i <= N; i++)
            if (i != centre){
                goTo(i);
                goTo(centre);
            }
    }
}

Subtask #1
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 672 KB Output is correct
2 Correct 47 ms 664 KB Output is correct
3 Correct 34 ms 732 KB Output is correct
4 Correct 39 ms 668 KB Output is correct

Subtask #2
0.0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 208 KB Invalid bit index for setHint
2 Halted 0 ms 0 KB -

Subtask #3
0.0 / 19.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 208 KB setHintLen was never called
2 Halted 0 ms 0 KB -

Subtask #4
0.0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 208 KB setHintLen was never called
2 Halted 0 ms 0 KB -

Subtask #5
0.0 / 40.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 208 KB setHintLen was never called
2 Halted 0 ms 0 KB -