Submission #1071068

#	Time	Username	Problem	Language	Result	Execution time	Memory
1071068		kunzaZa183	Cultivation (JOI17_cultivation)	C++17	30 / 100	1843 ms	1044 KiB

cultivation

#include <bits/stdc++.h>
using namespace std;
signed main() {
  int r,c;
  cin>>r>>c;
  int n;
  cin>>n;
  vector<pair<int,int>> vpii(n);
  for(int i = 0; i < n;i++) {
    cin>>vpii[i].first>>vpii[i].second;
    vpii[i].first--, vpii[i].second--;
  }

  long long minans = LLONG_MAX;
  for(int no = 0; no < r; no++ )
    for(int so = 0; so < r; so++) {
      set<pair<int,int>> spii;
      for(int j = 0; j < n;j++)
        for(int k = max(0,vpii[j].first-no); k <= min(r-1,vpii[j].first + so); k++) {
          spii.emplace(k, vpii[j].second);
        }
      
      vector<vector<int>> perr(r);
      for(auto a:spii)
        perr[a.first].push_back(a.second);

      int minw = 0, mine = 0, minsum = 0;
      for(int i =0 ; i < r;i++) {
        sort(perr[i].begin(),perr[i].end());
        if(perr[i].empty()) {
          goto CANT;
        }
        minw = max(minw, perr[i].front());
        mine = max(mine, c - 1 - perr[i].back());
        for(int j = 0 ; j < perr[i].size() - 1; j++) {
          minsum = max(minsum, perr[i][j + 1] - perr[i][j] - 1);
        }
      }
      
      // cout<<no<<' '<<so<<" "<<minw<<" "<<mine<<" "<<minsum<<"\n";

      minans = min(minans, ((long long)no) + so + max(minsum, mine + minw));

      CANT:;
    }

  cout<<minans<<"\n";
}

Compilation message (stderr)

cultivation.cpp: In function 'int main()':
cultivation.cpp:35:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |         for(int j = 0 ; j < perr[i].size() - 1; j++) {
      |                         ~~^~~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 15 / 15
• Subtask 4: 0 / 30
• Subtask 5: 0 / 20
• Subtask 6: 0 / 20