Submission #119729

#	Time	Username	Problem	Language	Result	Execution time	Memory
119729		nvmdava	Dancing Elephants (IOI11_elephants)	C++17	0 / 100	2 ms	384 KiB

elephants

#include "elephants.h"
#include <bits/stdc++.h>
#define ss second
#define ff first
using namespace std;

int n, l;
pair<int, int> a[50005];
int loc[50005];

void sorter(int id){
   while(id + 1 < n && a[id].ff > a[id + 1].ff){
      swap(a[id], a[id + 1]);
      swap(loc[a[id].ff], loc[a[id + 1].ff]);
      id++;
   }
   while(id && a[id].ff < a[id - 1].ff){
      swap(a[id], a[id - 1]);
      swap(loc[a[id].ss], loc[a[id - 1].ss]);
      id--;
   }
}

int count(){
   int lst = a[0].ff;
   int res = 1;
   for(int i = 1; i < n; i++){
      if(a[i].ff > lst + l){
         res++;
         lst = a[i].ff;
      }
   }
   return res;
}

void init(int N, int L, int X[]){
   n = N;
   l = L;
   for(int i = 0; i < N; i++){
      a[i].first = X[i];
      a[i].second = i;
   }
   sort(X, X + N);
   for(int i = 0; i < N; i++){
      loc[a[i].second] = i;
   }
}


int update(int i, int y){
   a[loc[i]].ff = y;
   sorter(loc[i]);
   return count();
}

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