Submission #737705

#	Time	Username	Problem	Language	Result	Execution time	Memory
737705		iee	Prisoner Challenge (IOI22_prison)	C++17	100 / 100	14 ms	980 KiB

prison

#include <bits/stdc++.h>
using namespace std;
void dfs(int l, int r, int L, int R, bool d, int id, int im, auto &a) {
  if (l > r) return;
  l++, r--;
  a[id][0] = d;
  for (int i = L; i <= R; ++i)
    if (i < l) a[id][i] = (d ? -2 : -1);
    else if (i > r) a[id][i] = (d ? -1 : -2);
  int s = r - l + 1, num = min(s, 2 + (s > 4)), len = ceil(1.0 * s / num);
  for (int x = l, y, i = 1; i <= num; x = y + 1, ++i) {
    y = min(r, x + len - 1);
    for (int j = x; j <= y; ++j)
      a[id][j] = im + i;
    dfs(x, y, l - 1, r + 1, !d, im + i, im + num, a);
  }
}
vector<vector<int>> devise_strategy(int n) {
  vector<vector<int>> a(21, vector<int>(n + 1));
  dfs(1, n, 1, n, 0, 0, 0, a);
  return a;
}

Compilation message (stderr)

prison.cpp:3:62: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
    3 | void dfs(int l, int r, int L, int R, bool d, int id, int im, auto &a) {
      |                                                              ^~~~

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 90 / 90