Submission #1066058

#	Time	Username	Problem	Language	Result	Execution time	Memory
1066058		ArthuroWich	Jousting tournament (IOI12_tournament)	C++17	49 / 100	1071 ms	37020 KiB

tournament

//#include "tournament.h"
#include<bits/stdc++.h>
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
typedef tree<pair<int, int>, null_type, less<pair<int, int>>, rb_tree_tag, tree_order_statistics_node_update> indexed_set;
struct node {
    int p = -1, b = 0, w = 1;
    vector<int> c = {};
};
node t[200005];
int timer, ra, v = 0, succ[200005][20];
void calc(int i) {
    for (int j : t[i].c) {
        calc(j);
    }
    for (int j : t[i].c) {
        t[i].b += t[j].b;
    }
}
void update(int i) {
    for (int j : t[i].c) {
        t[i].b += t[j].b;
    }
    if (t[i].p != -1) {
        t[t[i].p].b = 0;
        update(t[i].p);
    }
}
void initsucc() {
    for (int j = 1; j < 20; j++) {
        for (int i = 0; i < 200000; i++) {
            succ[i][j] = succ[succ[i][j-1]][j-1];
        }
    }
}
void trav(int i) {
    i++;
    for (int j = 19; j >= 0; j--) {
        if (succ[i][j]-1 < 0) {
            continue;
        }
        if (t[succ[i][j]-1].b == 0) {
            v += (1<<j);
            i = succ[i][j];
        }
    }
}
int GetBestPosition(int n, int m, int r, int k[], int S[], int E[]) {
    ra = r;
    indexed_set e;
    timer = n;
    int ans = 0, ind = -1;
    for (int i = 0; i < n; i++) {
        e.insert({i, i});
    }
    for (int j = 0; j < 20; j++) {
        for (int i = 0; i <= 200000; i++) {
            succ[i][j] = 0;
        }
    }
    for (int i = 0; i < n-1; i++) {
        if (k[i] > r) {
            t[i+1].b = 1;
        }
    }
    for (int i = 0; i < m; i++) {
        int le = E[i]-S[i]+1;
        set<pair<int, int>> todel;
        pair<int, int> c;
        auto ind = e.find_by_order(S[i]);
        int l = INT_MAX;
        t[timer].w = 1;
        while(le--) {
            c = *ind;
            todel.insert(c);
            l = min(l, c.first);
            t[timer].c.push_back(c.second);
            t[c.second].p = timer;
            succ[c.second+1][0] = timer+1;
            ind++;
        }
        for (auto c : todel) {
            e.erase(c);
        }
        e.insert({l, timer});
        timer++;
    }
    initsucc();
    int root = timer-1;
    calc(root);
    trav(0);
    ans = v;
    ind = 0;
    for (int i = 1; i < n; i++) {
        swap(t[i-1].b, t[i].b);
        update(i-1);
        update(i);
        v = 0;
        trav(i);
        if (v > ans) {
            ans = v;
            ind = i;
        }
    }
    return ind;
}

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