Submission #115330

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
115330	2019-06-06T17:24:28 Z	model_code	Hotel (CEOI11_hot)	C++17	100 / 100	1694 ms	39492 KB

/* Model solution for task HOT
 * Author: Miroslaw Michalski
 * Time complexity : O(n log n)
 * 24APR11
 * pure STL stuff
 * when equal room sizes sort in rev. order
 */
#include <cstdio>
#include <vector>
#include <set>
#include <map>
#include <algorithm>
#include <iostream>

using namespace std;
int main() {
  int n, m, o, ci, pi;
  long long res = 0;
  vector<int> think;
  map<pair<int, int>, int > v;
  scanf("%d%d%d", &n, &m, &o);
  for(int i = 0; i < n; i++) {
    scanf("%d%d", &ci, &pi);
    pair<int, int> obj = make_pair(pi, ci);

    if (v.find(obj) == v.end()) {
      v[obj] = 1;
    } else {
      v[obj]++;
    }
  }
  vector<pair<int, int> > q;
  for(int i = 0; i < m; i++) {
    scanf("%d%d", &ci, &pi);
    q.push_back(make_pair(ci, -pi));
  }
  sort(q.begin(), q.end());
  reverse(q.begin(), q.end());
  
  for(int i = 0; i < m; i++) {
    ci = q[i].first;
    pi = -q[i].second;
    map<pair<int, int>, int>::iterator it = v.lower_bound(make_pair(pi, -1));
    if (it != v.end()) {
      if ((it->first).second < ci) {
        think.push_back(ci - (it->first).second);
      }
      if (it->second == 1) {
        v.erase(it);
      } else {
        v[it->first] --;
      }
    }
  }
  sort(think.begin(), think.end());
  reverse(think.begin(), think.end());
  o = min(o, static_cast<int>(think.size()));
  for(int i = 0; i < o; i++) {
    res += think[i];
  }
  printf("%lld\n", res);
  return 0;
}

Compilation message

hot.cpp: In function 'int main()':
hot.cpp:21:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%d", &n, &m, &o);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~
hot.cpp:23:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &ci, &pi);
     ~~~~~^~~~~~~~~~~~~~~~~~
hot.cpp:34:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &ci, &pi);
     ~~~~~^~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	256 KB	Output is correct

Subtask #2
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	384 KB	Output is correct
2	Correct	2 ms	384 KB	Output is correct

Subtask #3
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	256 KB	Output is correct
2	Correct	2 ms	256 KB	Output is correct

Subtask #4
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	384 KB	Output is correct
2	Correct	2 ms	384 KB	Output is correct

Subtask #5
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	16 ms	1024 KB	Output is correct

Subtask #6
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	66 ms	3472 KB	Output is correct

Subtask #7
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	126 ms	5920 KB	Output is correct
2	Correct	103 ms	5424 KB	Output is correct

Subtask #8
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	457 ms	15968 KB	Output is correct
2	Correct	195 ms	8380 KB	Output is correct

Subtask #9
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1014 ms	31872 KB	Output is correct
2	Correct	1237 ms	29752 KB	Output is correct

Subtask #10
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	998 ms	23760 KB	Output is correct
2	Correct	1268 ms	39096 KB	Output is correct
3	Correct	1694 ms	39492 KB	Output is correct