Submission #29088

#	Time	Username	Problem	Language	Result	Execution time	Memory
29088		kavun	Dancing Elephants (IOI11_elephants)	C++14	26 / 100	9000 ms	25700 KiB

elephants

#include "elephants.h"
#include <bits/stdc++.h>

using namespace std;
set <pair<int,int> > st;
vector <int> x;
int n, l;

void init(int N, int L, int X[])
{
  n = N; l = L;
  for(int i = 0; i < n; i++)
    {
      st.insert(make_pair(X[i],i));
      x.push_back(X[i]);
    }
}

int update(int i, int y)
{
  int res = 1;
  set<pair<int,int> >::iterator it = st.find(make_pair(x[i],i));
  x[i] = y;
  st.erase(it);
  st.insert(make_pair(y,i));
  set<pair<int,int> >::iterator leftmost = st.begin();
  while(leftmost != st.end())
    {
      pair<int,int> pr = *leftmost;
      int pos = pr.first; int id = pr.second;
      leftmost = st.upper_bound(make_pair(pr.first + l,1e9));
      if(leftmost != st.end())
		res++;
    }
  return res;
}

Compilation message (stderr)

elephants.cpp: In function 'int update(int, int)':
elephants.cpp:30:11: warning: unused variable 'pos' [-Wunused-variable]
       int pos = pr.first; int id = pr.second;
           ^
elephants.cpp:30:31: warning: unused variable 'id' [-Wunused-variable]
       int pos = pr.first; int id = pr.second;
                               ^

• Subtask 1: 10 / 10
• Subtask 2: 16 / 16
• Subtask 3: 0 / 24
• Subtask 4: 0 / 47
• Subtask 5: 0 / 3