Submission #625404

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
625404	2022-08-10 11:27:56	model_code	Catfish Farm (IOI22_fish)	C++17	100 / 100	216 ms	39332 KiB

fish

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#include <bits/stdc++.h>
using namespace std;
constexpr int kUp = 0;
constexpr int kDown = 1;
long long max_weights(int N, int M, std::vector<int> X, std::vector<int> Y,
                      std::vector<int> W) {
  vector<vector<pair<int, int>>> fishes(N);
  for (int i = 0; i < M; ++i) {
    fishes[X[i]].push_back(make_pair(Y[i], i));
  }
  long long largest = 0;
  vector<pair<int, long long>> up, down;
  vector<vector<long long>> dp(M, vector<long long>(2, LLONG_MIN / 2));
  for (int x = 0; x < N; ++x) {
    sort(fishes[x].begin(), fishes[x].end());
    if (x > 0) {
      long long max_down = 0;
      for (int j = (int)fishes[x].size() - 1; j >= 0; --j) {
        int y = fishes[x][j].first;
        int i = fishes[x][j].second;
        while (down.size() > 0 && down.back().first > y) {
          max_down = max(max_down, down.back().second);
          down.pop_back();
        }
 
 
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