Submission #541563

#	Time	Username	Problem	Language	Result	Execution time	Memory
541563		MohamedFaresNebili	Jousting tournament (IOI12_tournament)	C++14	0 / 100	1078 ms	2356 KiB

tournament

#include <bits/stdc++.h>
#pragma GCC optimize ("Ofast")
#pragma GCC target ("avx2")

        using namespace std;

        using ll = long long;
        using ii = pair<ll, ll>;

        #define ff first
        #define ss second
        #define pb push_back
        /// #define int ll

        const int MOD = 1e9 + 7;

        int st[400001], par[100001], mx[100001];
        void update(int v, int l, int r, int pos, int val) {
            if(l == r) {
                st[v] = val;
                return;
            }
            int md = (l + r) / 2;
            if(pos <= md) update(v * 2, l, md, pos, val);
            else update(v * 2 + 1, md + 1, r, pos, val);
            st[v] = max(st[v * 2], st[v * 2 + 1]);
        }
        int query0(int v, int l, int r, int lo, int hi) {
            if(l > hi || r < lo) return 0;
            if(l >= lo && r <= hi) return st[v];
            return max(query0(v * 2, l, (l + r) / 2, lo, hi), query0(v * 2 + 1, (l + r) / 2 + 1, r, lo, hi));
        }
        int findSet(int v) {
            if(par[v] == v) return v;
            return par[v] = findSet(par[v]);
        }

        int GetBestPosition(int N, int C, int R, int *K, int *S, int *E) {
            int res = 0, curr = 0;
            vector<ii> query; vector<int> s;
            for(int l = 0; l < N; l++) s.push_back(l);
            for(int l = 0; l < C; l++) {
                int lf = S[l], rf = E[l]; query.pb({s[lf], s[rf]});
                s.erase(s.begin() + lf, s.begin() + rf);
            }
            for(int l = 0; l < N; l++) {
                for(int i = 0; i < l; i++) {
                    par[i] = i, mx[i] = K[i];
                    update(1, 0, N - 1, i, mx[i]);
                }
                par[l] = l; mx[l] = R; update(1, 0, N - 1, l, mx[l]);
                for(int i = l; i < N - 1; i++) {
                    par[i + 1] = i + 1, mx[i + 1] = K[i];
                    update(1, 0, N - 1, i + 1, K[i]);
                }
                int calc = 0;
                for(auto u : query) {
                    int lf = u.ff, rf = u.ss;
                    /// lf = findSet(lf), rf = findSet(rf);
                    /// if(lf > rf) swap(lf, rf);
                    /// par[rf] = lf; mx[lf] = max({mx[lf], mx[rf]});
                    int val = query0(1, 0, N - 1, lf, rf);
                    if(val == R) calc++;
                }
                if(calc > curr) {
                    curr = calc, res = l;
                }
            }
            return res;
        }

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