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Submission #430602

# Submission time Handle Problem Language Result Execution time Memory
430602 2021-06-16T16:56:21 Z JeanBombeur Jousting tournament (IOI12_tournament) C++17
100 / 100
 64 ms 4444 KB 
#include <iostream>
#include <cstdio>
#include <vector>
using namespace std;

//    <|°_°|>

const int INFINI = (1000 * 1000 * 1000);
const int MAX_CHEVALIERS = (100 * 1000);
const int LOG = (16);

int NbVictoires[MAX_CHEVALIERS];
int Rang[MAX_CHEVALIERS];

int Next[MAX_CHEVALIERS];

int Fenwick[MAX_CHEVALIERS];

int FindNext(int a) {
    if (Rang[Next[a]] >= 0)
        return Next[a];
    return Next[a] = FindNext(Next[a]);
}

void Add(int id, int val) {
    for (int i = id; i < MAX_CHEVALIERS; i |= (i + 1))
    {
        Fenwick[i] += val;
    }
    return;
}

int FindFirst(int nb) {
    int ans = -1;
    int sum = 0;
    for (int i = (1 << LOG); i > 0; i >>= 1)
    {
        if (ans + i < MAX_CHEVALIERS && sum + Fenwick[ans + i] < nb)
        {
            ans += i;
            sum += Fenwick[ans];
        }
    }
    return ans + 1;
}

int GetBestPosition(int nbChevaliers, int nbRounds, int nouvRang, int *Ranks, int *Left, int *Right) {

    for (int i = 0; i < nbChevaliers; i ++)
    {
        Next[i] = i + 1;
        Rang[i] = Ranks[i];
        NbVictoires[i] = 0;
        Add(i, 1);
    }
    
    pair <int, int> ans = {0, 0};
    
    for (int i = 0; i < nbRounds; i ++)
    {
        Left[i] ++, Right[i] ++;
        vector <int> pos;
        
        /*for (int j = Left[i]; j <= Right[i]; j ++)
        {
            pos.push_back(FindFirst(j));
        }*/
        
        int first = FindFirst(Left[i]);
        
        for (int c = Left[i]; c <= Right[i]; c ++)
        {
            pos.push_back(first);
            first = FindNext(first);
        }
        
        int maxRang = -1;
        pair <int, int> maxDP = {- INFINI - 1, 0};
        
        for (int a : pos)
        {
            if (a != pos.back())
                maxRang = max(maxRang, Rang[a]);
            if (NbVictoires[a] > maxDP.first)
                maxDP = {NbVictoires[a], a};
        }
        
        maxDP.first ++;
        
        if (maxRang > nouvRang)
            maxDP.first = - INFINI;
        
        Rang[maxDP.second] = max(maxRang, Rang[pos.back()]);
        NbVictoires[maxDP.second] = maxDP.first;
        
        for (int a : pos)
        {
            if (a != maxDP.second)
            {
                Rang[a] = -1;
                Add(a, -1);
                NbVictoires[a] = - INFINI;
            }
        }
        
        if (maxDP.first > ans.first || (maxDP.first == ans.first && maxDP.second < ans.second))
        {
            ans = make_pair(maxDP.first, maxDP.second);
        }
    }
    return ans.second;
}

Subtask #1
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct

Subtask #2
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 3 ms 460 KB Output is correct
3 Correct 2 ms 460 KB Output is correct
4 Correct 3 ms 460 KB Output is correct
5 Correct 4 ms 460 KB Output is correct
6 Correct 4 ms 460 KB Output is correct
7 Correct 3 ms 460 KB Output is correct
8 Correct 4 ms 460 KB Output is correct
9 Correct 2 ms 572 KB Output is correct
10 Correct 3 ms 460 KB Output is correct

Subtask #3
51.0 / 51.0

# Verdict Execution time Memory Grader output
1 Correct 26 ms 1464 KB Output is correct
2 Correct 61 ms 4424 KB Output is correct
3 Correct 29 ms 4444 KB Output is correct
4 Correct 54 ms 3868 KB Output is correct
5 Correct 64 ms 3684 KB Output is correct
6 Correct 47 ms 3572 KB Output is correct
7 Correct 62 ms 3912 KB Output is correct
8 Correct 56 ms 4076 KB Output is correct
9 Correct 21 ms 4216 KB Output is correct
10 Correct 23 ms 2836 KB Output is correct