제출 #849886

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
849886		tosivanmak	Arranging Shoes (IOI19_shoes)	C++17	10 / 100	1 ms	348 KiB

shoes

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

struct pairs{
   ll l,r;
   bool operator<(const pairs& p)const{
       vector<ll>v;
       v.push_back(l);
       v.push_back(r);
       v.push_back(p.l);
       v.push_back(p.r);
       ll cnt=0;
       for(int i=0;i<4;i++){
           for(int j=i-1;j>=0;j--){
               if(v[j]<v[i]){
                   cnt++;
               }
           }
       }
        vector<ll>v2;
       v2.push_back(p.l);
       v2.push_back(p.r);
       v2.push_back(l);
       v2.push_back(r);
       ll cnt2=0;
       for(int i=0;i<4;i++){
           for(int j=i-1;j>=0;j--){
               if(v2[j]<v2[i]){
                   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;
     }
};
long long count_swaps(std::vector<int> s) {
    vector<ll>make;
    vector<ll>adj[s.size()+5],adj2[s.size()+5];
     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);
         }
     }
     ll ptr[s.size()+5];
     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<<" ";
    //  }
     FEN f;
     f.init(s.size());
     ll ans=0;
     for(int i=0;i<real.size();i++){
         ans+=f.sum(s.size())-f.sum(real[i]);
         f.upd(real[i],s.size(),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

컴파일 시 표준 에러 (stderr) 메시지

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:66:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   66 |      for(int i=0;i<s.size();i++){
      |                  ~^~~~~~~~~
shoes.cpp:76:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   76 |      for(int i=0;i<=s.size()+4;i++){
      |                  ~^~~~~~~~~~~~
shoes.cpp:83:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   83 |      for(int i=0;i<make.size();i++){
      |                  ~^~~~~~~~~~~~
shoes.cpp:89:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<pairs>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   89 |      for(int i=0;i<bruh.size();i++){
      |                  ~^~~~~~~~~~~~
shoes.cpp:99:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   99 |      for(int i=0;i<real.size();i++){
      |                  ~^~~~~~~~~~~~

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