Submission #105913

#	Time	Username	Problem	Language	Result	Execution time	Memory
105913		nvmdava	Jousting tournament (IOI12_tournament)	C++17	0 / 100	114 ms	9608 KiB

tournament

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
using namespace std;
using namespace __gnu_pbds;
#define N 131075
int n;
int r[N];
int lef[N][20];
int logg[N];
void fillsparse(){
    for(int i = 1; i <= n; i++){
        lef[i][0] = r[i];
        for(int j = 1; j < 20; j++){
            if(i < (1 << j))
                break;
            lef[i][j] = max(lef[i][j - 1], lef[i - (1 << (j - 1))][j - 1]);
        }
    }
    logg[1] = 0;
    for(int i = 2; i <= 131072; i++)
        logg[i] = logg[i / 2] + 1;
}


int getmin(int l, int r){
    int sz = logg[r - l + 1];
    return max(lef[r][sz], lef[l + (1 << sz) - 1][sz]);
}

int segTree[2 * N];
#define MX 131072
void update(int id, int l, int r, int L, int R){
    if(l == L && r == R){
        segTree[id]++;
        return;
    }
    int m = (l + r) >> 1;
    if(m < L) update(id << 1 | 1, m + 1, r, L, R);
    else if(m >= R) update(id << 1, l, m, L, R);
    else {
        update(id << 1, l, m, L, m);
        update(id << 1 | 1, m + 1, r, m + 1, R);
    }
}
typedef tree<pair<int, int>, null_type, less_equal<pair<int, int>>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;
ordered_set pos;

int GetBestPosition(int NN, int C, int R, int *K, int *S, int *E) {
    n = NN;
    pos.insert({0, 0});
    for(int i = 1; i < n; i++){
        r[i] = S[i - 1];
        pos.insert({i, i});
    }
    pos.insert({n, n});
    r[n] = -1;

    fillsparse();
    for(int i = 0; i < C; i++){
        S[i]++;
        E[i]++;
        int lst = (*pos.find_by_order(E[i])).second;
        int beg = (*pos.find_by_order(S[i])).first;
        for(; E[i] >= S[i]; E[i]--){
            pos.erase(pos.find_by_order(E[i]));
        }
        E[i] = lst;
        S[i] = beg;
        pos.insert({beg, lst});

        if(getmin(S[i], E[i] - 1) < R){
            update(1, 1, MX, S[i], E[i]);
        }
    }

    for(int i = 1; i < MX; i++){
        segTree[i << 1] += segTree[i];
        segTree[i << 1 | 1] += segTree[i];
    }
    int best = 0;
    for(int i = 1; i < n; i++){
        if(segTree[MX + i] > segTree[MX + best]){
            best = i;
        }
    }

    return best;
}

• Subtask 1: 0 / 17
• Subtask 2: 0 / 32
• Subtask 3: 0 / 51