Submission #284531

#	Time	Username	Problem	Language	Result	Execution time	Memory
284531		IOrtroiii	Teams (IOI15_teams)	C++14	34 / 100	4089 ms	62068 KiB

teams

#include "teams.h"

#include <bits/stdc++.h>

using namespace std;

const int MX = 500500;

int N;
int A[MX];
int B[MX];
vector<int> add[MX];
vector<int> sub[MX];

void init(int _N, int _A[], int _B[]) {
   N = _N;
   for (int i = 0; i < N; ++i) {
      A[i] = _A[i];
      B[i] = _B[i];
      add[A[i]].emplace_back(i);
      sub[B[i]+1].emplace_back(i);
   }
}

bool delt[MX];

int can(int M, int K[]) {
	sort(K, K + M);
   for (int i = 0; i < N; ++i) delt[i] = false;
   set<pair<int, int>> st;
   int ptr = 0;
   for (int i = 0; i < M; ++i) {
      while (ptr < K[i]) {
         ++ptr;
         for (int z : add[ptr]) st.emplace(B[z], z);
         for (int z : sub[ptr]) if (!delt[z]) st.erase(st.find(make_pair(B[z], z)));
      }
      if (st.size() < K[i]) return 0;
      for (int z = 0; z < K[i]; ++z) {
         int x = st.begin()->second;
         st.erase(st.begin());
         delt[x] = true;
      }
   }
	return 1;
}

Compilation message (stderr)

teams.cpp: In function 'int can(int, int*)':
teams.cpp:38:21: warning: comparison of integer expressions of different signedness: 'std::set<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   38 |       if (st.size() < K[i]) return 0;
      |           ~~~~~~~~~~^~~~~~

• Subtask 1: 21 / 21
• Subtask 2: 13 / 13
• Subtask 3: 0 / 43
• Subtask 4: 0 / 23