Submission #1065639

#	Time	Username	Problem	Language	Result	Execution time	Memory
1065639		modwwe	Arranging Shoes (IOI19_shoes)	C++17	100 / 100	225 ms	274116 KiB

shoes

//https://www.instagram.com/_modwwe/
#pragma GCC optimize("Ofast,unroll-loops")
#include<bits/stdc++.h>
//#define int long long
#define ll long long
#define down cout<<'\n';
#define debug cout<<" cucuucucuuu",down
#define NHP     ios_base::sync_with_stdio(0);cout.tie(0);cin.tie(0);
#define modwwe  int t;cin>>t; while(t--)
#define bit(i,j) (i>>j&1)
#define sobit(a) __builtin_popcountll(a)
#define task "test"
#define fin(x) freopen(x".inp","r",stdin)
#define fou(x) freopen(x".ans","w",stdout)
#define pb push_back
#define checktime   cerr << (double)clock() / CLOCKS_PER_SEC * 1000  << " ms";
using namespace std;
void phongbeo();
const int inf=1e9;
const int mod2=1e9+7;
const int  mod1=998244353;
struct icd
{
    long double a;
    int b;
};
struct ib
{
    int a;
    int b;
};
struct ic
{
    int a,b,c;
};
struct id
{
    int a,b,c,d;
};
struct ie
{
    int a,b,c,d,e;

};

ll n,m,s1,s2,s4,s3,sf,k,s5,s6,mx,s7,s8,s9,mx2,res,dem2=0,dem=0,s33,dem3,l,r,mid;
int  i,s10,s12;
int kk;
int el=29;
struct fenwick{
int bit[200001];
void upd(int x)
{
     for(x;x<=n;x+=x&-x)
        bit[x]++;
}
int get(int x)
{
    ll s=0;
    for(x;x;x-=x&-x) s+=bit[x];
     return s;
}
}fen;
long long count_swaps(vector<int> a)
{
     n=a.size();
     stack<int> s[n+1],s2[n+1];
      for(int i=n-1;i>=0;--i)
      {
         if(a[i]<0) s2[-a[i]].push(i);
         else s[a[i]].push(i);
      }
       for(int i=0;i<n;i++)
       {
            if(a[i]<0)
            {
                 if(s2[-a[i]].size()==0||s2[-a[i]].top()!=i) continue;
            a[i]=-a[i];
           s4-=i;
             s3=s[a[i]].top();
              s4+=s3;
              s4--;
              s4=s4-fen.get(s3)+fen.get(i);
              fen.upd(s3+1);
                         s2[a[i]].pop();
             s[a[i]].pop();
            }
            else
            {
                 if(s[a[i]].size()==0||s[a[i]].top()!=i) continue;
                 s4-=i;
                  s3=s2[a[i]].top();
                  s4+=s3;
                  s4=s4-fen.get(s3)+fen.get(i);
                fen.upd(s3+1);
                                 s[a[i]].pop();
                                                   s2[a[i]].pop();
            }
       }
    return s4;
}

Compilation message (stderr)

shoes.cpp: In member function 'void fenwick::upd(int)':
shoes.cpp:54:10: warning: statement has no effect [-Wunused-value]
   54 |      for(x;x<=n;x+=x&-x)
      |          ^
shoes.cpp: In member function 'int fenwick::get(int)':
shoes.cpp:60:9: warning: statement has no effect [-Wunused-value]
   60 |     for(x;x;x-=x&-x) s+=bit[x];
      |         ^

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