Submission #143575

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
143575	2019-08-14 16:16:58	abeker	Arranging Shoes (IOI19_shoes)	C++17	100 / 100	99 ms	19192 KiB

shoes

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#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int MAXN = 2e5 + 5;
int N;
vector <int> lft[MAXN], rig[MAXN];
int fen[MAXN];
void update(int x) {
  for (x++; x < MAXN; x += x & -x)
    fen[x]++;
}
int get(int x) {
  int res = 0;
  for (x++; x; x -= x & -x)
    res += fen[x];
  return res;
}
  
ll count_swaps(vector <int> shoes) {
  N = shoes.size();
  vector <int> todo(N, -1);
  for (int i = 0; i < N; i++) {
    int sz = abs(shoes[i]);
    if (shoes[i] < 0)       
      lft[sz].push_back(i);
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

shoes.cpp: In function 'll count_swaps(std::vector<int>)':
shoes.cpp:37:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int j = 0; j < lft[i].size(); j++) {
                   ~~^~~~~~~~~~~~~~~

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