Submission #401250

#	Time	Username	Problem	Language	Result	Execution time	Memory
401250		my99n	Comparing Plants (IOI20_plants)	C++14	0 / 100	4062 ms	336 KiB

plants

#include "plants.h"
#include <bits/stdc++.h>
using namespace std;

int n;
int ans[5010];
int in[5010];
vector<int> g[5010];
vector<int> r;

int dis (int i, int j) {
  if (i == -1e9 or j == -1e9) return -1e9;
  return (j-i+n) % n;
}

void init(int k, vector<int> R) {
  r = R;
  n = r.size();

  int cnt = 0;
  while (cnt < n) {
    queue<int> c;
    for (int i = 0; i < n; i++) {
      if (r[i] == 0) {
        for (int j = 1; j < k; j++) {
          int ind = (i+j+n)%n;
          if (r[ind] == -1) continue;
          g[ind].push_back(i);
          // cerr << ind << " -> " << i << endl;
          in[i]++;
        }
        c.push(i);
        // cerr << "out " << i << endl;
        r[i] = -1;
        cnt++;
      }
    }
    while (!c.empty()) {
      auto t = c.front(); c.pop();
      for (int i = 1; i < k; i++) {
        int ind = (t-i+n) % n;
        // cerr << "- " << ind << endl;
        if (r[ind] != -1) {
          g[ind].push_back(t);
          in[t]++;
          // cerr << ind << " -> " << t << endl;
          r[ind]--;
        }
      }
    }
  }
  queue<pair<int,int>> q;
  for (int i = 0; i < n; i++) {
    if (in[i] == 0) q.push({i, 0}); // smallest
  }
  while (!q.empty()) {
    auto [t, l] = q.front(); q.pop();
    ans[t] = l;
    for (auto x : g[t]) {
      in[x]--;
      if (!in[x]) q.push({x, l+1});
    }
  }
	return;
}

int compare_plants(int x, int y) {
  if (ans[x] < ans[y]) return -1;
  if (ans[x] > ans[y]) return 1;
	return 0;
}

Compilation message (stderr)

plants.cpp: In function 'void init(int, std::vector<int>)':
plants.cpp:57:10: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   57 |     auto [t, l] = q.front(); q.pop();
      |          ^

• Subtask 1: 0 / 5
• Subtask 2: 0 / 14
• Subtask 3: 0 / 13
• Subtask 4: 0 / 17
• Subtask 5: 0 / 11
• Subtask 6: 0 / 15
• Subtask 7: 0 / 25