Submission #684105

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
684105	2023-01-20 12:00:28	Dulguun	Arranging Shoes (IOI19_shoes)	C++14	10 / 100	1 ms	340 KiB

shoes

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#include<bits/stdc++.h>
using namespace std;
long long count_swaps(vector<int> s){
  map<int, vector<int> > m;
  int l=s.size(), n=(s.size()+1)/2;
  long long sum=0;
  for(int i=0; i<l; i++){
    m[s[i]].push_back(i);
  }
  for(int i=0; i<l; i++){
    if(s[i]==0) continue;
    sum+=m[-s[i]][0]-i-1;
    if(s[i]>0) sum++;
    s[m[-s[i]][0]]=0;
    m[-s[i]].erase(m[-s[i]].begin());
  }
  return sum;
}
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:6:18: warning: unused variable 'n' [-Wunused-variable]
    6 |  int l=s.size(), n=(s.size()+1)/2;
      |                  ^

• Subtask 1: 10 / 10
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 15
• Subtask 5: 0 / 20
• Subtask 6: 0 / 15