Submission #593484

#	Time	Username	Problem	Language	Result	Execution time	Memory
593484		Mamedov	Jousting tournament (IOI12_tournament)	C++17	49 / 100	1093 ms	4784 KiB

tournament

#pragma GCC optimize ("O3")
#include <bits/stdc++.h>
#define pii pair<int, int>
#define piii pair<pii, int>
#define vi vector<int>
#define vvi vector<vi>
#define vpii vector<pii>
#define vvpii vector<vpii>
#define f first
#define s second
#define oo 1000000001
#define eb emplace_back
#define pb push_back
#define mpr make_pair
#define size(v) (int)v.size()
#define ln '\n'
#define ull unsigned long long
#define ll long long
#define all(v) v.begin(), v.end()

using namespace std;

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

// sub 1-2, 49 points simple
int dfs(int node, int N, int R, vi &val, vvi &g) {
  int res = 0;
  for (int to : g[node]) {
    res += dfs(to, N, R, val, g);
    val[node] = max(val[node], val[to]);
  }
  if (node >= N && val[node] == R) ++res;
  return res;
}

int GetBestPosition(int N, int C, int R, int *K, int *S, int *E) {
  vvi g(2 * N);
  int nextNode = N - 1;
  vector<int>root(N), alive(N, 1);
  for (int i = 0; i < N; ++i) {
    root[i] = i;
  }
  for (int i = 0; i < C; ++i) {
    int node = -1, cnt = 0;
    while (cnt <= S[i]) {
      ++node;
      if (alive[node]) {
        ++cnt;
      }
    }
    g[++nextNode].eb(root[node]);
    root[node] = nextNode;
    while (cnt <= E[i]) {
      ++node;
      if (alive[node]) {
        g[nextNode].eb(root[node]);
        alive[node] = 0;
        ++cnt;
      }
    }
  }
  int best = 0, bestPos = 0;
  for (int i = 0; i < N; ++i) {
    vector<int>val(nextNode + 1, -1);
    for (int j = 0; j < i; ++j) {
      val[j] = K[j];
    }
    val[i] = R;
    for (int j = i; j < N - 1; ++j) {
      val[j + 1] = K[j];
    }
    int cur = dfs(nextNode, N, R, val, g);
    if (cur > best) {
      best = cur;
      bestPos = i;
    }
  }
  return bestPos;
}

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