Submission #849901

#	Time	Username	Problem	Language	Result	Execution time	Memory
849901		tosivanmak	Arranging Shoes (IOI19_shoes)	C++17	65 / 100	57 ms	24768 KiB

shoes

#include<bits/stdc++.h>
using namespace std;
#define ll long long

struct pairs{
   ll l,r;
   bool operator<(const pairs& p)const{
    //    l,r,p.l,p.r
       ll cnt=0;
      if(r<l){
           cnt++;
       }
        if(p.l<l){
           cnt++;
       }
        if(p.l<r){
           cnt++;
       }
        if(p.r<l){
           cnt++;
       }
        if(p.r<r){
           cnt++;
       }
        if(p.r<p.l){
           cnt++;
       }
       ll cnt2=0;
    //    p.l,p.r,l,r
       if(p.r<p.l){
           cnt2++;
       }
        if(l<p.l){
           cnt2++;
       }
        if(l<p.r){
           cnt2++;
       }
        if(r<p.l){
           cnt2++;
       }
        if(r<p.r){
           cnt2++;
       }
        if(r<l){
           cnt2++;
       }
    //    cout<<1;
    return cnt<=cnt2;
   }
};

struct FEN{
     vector<ll>fen;
     void init(ll n){
         fen.resize(n+5);
         for(int i=0;i<=n+4;i++){
             fen[i]=0;
         }
     }
     void upd(ll n, ll m, ll val){
         for(int i=n;i<=m;i+=i&(-i)){
             fen[i]+=val;
            //  cout<<i;
         }
     }
     ll sum(ll e){
         ll su=0;
         while(e>=1){
             su+=fen[e];
             e-=e&(-e);
         }
        //  cout<<1;
         return su;
     }
}f;
vector<ll>adj[200005],adj2[200005]; ll ptr[200005];
long long count_swaps(std::vector<int> s) {
    vector<ll>make;
    
     for(int i=0;i<s.size();i++){
         if(s[i]<0){
             make.push_back(abs(s[i]));
             adj[abs(s[i])].push_back(i+1);
         }
         else{
             adj2[s[i]].push_back(i+1);
         }
     }
    
     for(int i=0;i<=s.size()+4;i++){
         ptr[i]=0;
     }
     vector<pairs>bruh;
    //  for(auto u: adj[2]){
    //      cout<<u<<" ";
    //  }
     for(int i=0;i<make.size();i++){
         bruh.push_back({adj[make[i]][ptr[make[i]]],adj2[make[i]][ptr[make[i]]]});
         ptr[make[i]]++;
     }
     sort(bruh.begin(),bruh.end());
     vector<ll>real;
     for(int i=0;i<bruh.size();i++){
        real.push_back(bruh[i].l);
        real.push_back(bruh[i].r);
     }
    //  for(auto u: real){
    //      cout<<u<<" ";
    //  }
     f.init(200000);
     ll ans=0;
     for(int i=0;i<real.size();i++){
         ans+=f.sum(200000)-f.sum(real[i]);
        //  cout<<f.sum(200000)<<" "<<real[i]<<" ";
        //  cout<<f.sum(real[i])<<"\n";
         f.upd(real[i],200000,1);
     }
     return ans;
    // return 0;
}

// #ifndef ONLINE_JUDGE
//   int main() {
// 	int n;
// 	cin>>n;
// 	vector<int> S(2 * n);
// 	for (int i = 0; i < 2 * n; i++){
// 		cin>>S[i];
//     }
// 	long long result = count_swaps(S);

//     cout<<result<<"\n";
// 	return 0;
// }
// #endif

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:81:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   81 |      for(int i=0;i<s.size();i++){
      |                  ~^~~~~~~~~
shoes.cpp:91:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   91 |      for(int i=0;i<=s.size()+4;i++){
      |                  ~^~~~~~~~~~~~
shoes.cpp:98:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   98 |      for(int i=0;i<make.size();i++){
      |                  ~^~~~~~~~~~~~
shoes.cpp:104:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<pairs>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  104 |      for(int i=0;i<bruh.size();i++){
      |                  ~^~~~~~~~~~~~
shoes.cpp:113:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  113 |      for(int i=0;i<real.size();i++){
      |                  ~^~~~~~~~~~~~

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