| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 294047 | Leonardo16 | Arranging Shoes (IOI19_shoes) | C++14 | 0 ms | 0 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
/// Code by Leonardo16
/// “Your focus determines your reality.” – Qui-Gon Jinn
#include<bits/stdc++.h>
using namespace std;
#pragma GCC optimize("Ofast","unroll-loops","omit-frame-pointer","inline")
//#pragma GCC option("arch=native","tune=native","no-zero-upper")
//#pragma GCC target("avx2")
//#define int long long
#define ll long long
#define sz size
#define ull unsigned long long
#define ld long double
#define ii pair<int,int>
#define fst first
#define scd second
#define vi vector<int>
#define vii vector<ii>
#define pb push_back
#define pf push_front
#define fl '\n'
#define el endl
#define all(x) x.begin() , x.end()
#define rall(x) x.rbegin() , x.rend()
/// Functions
#define db(x) cerr << #x << ": " << (x) << '\n';
#define random() __builtin_ia32_rdtsc()
#define lg2(x) 31-__builtin_clz(x)
#define lg2ll(x) 63-__builtin_clzll(x)
#define pi acos(-1)
#define YN(x) cout<<((x)?("YES"):("NO"))<<fl;
#define yn(x) cout<<((x)?("Yes"):("No"))<<fl;
#define des(x,s1,s2,end1,end2) cout<<((x)?(s1):(s2))<<fl;if(x){end1;}else{end2;}
#define precision(x) cout.setf(ios::fixed);cout.precision(x);
/// Red-Black Tree Template
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
//using namespace __gnu_pbds;
//typedef tree < long long , null_type , less<long long> , rb_tree_tag , tree_order_statistics_node_update > ordered_set;
//#define less_than(n) order_of_key(n)
//#define en_pos(n) find_by_order(n)
/// Prime numbers 173,179,311,331,737,1009,2011,2027,3079,4001,100003
///=====================================================================
deque<int>neg[100005],pos[100005];
int abi[200005];
void update(int pos,int val){
while(pos<200005){
abi[pos]+=val;
pos+=(pos&-pos);
}
}
int query(int pos){
int ret=0;
while(pos>0){
ret+=abi[pos];
pos-=(pos&-pos);
}
return ret;
}
ll count_swaps(vi v){
int n=v.sz();
int ans=0;
for(int i=0;i<n;i++){
// cout<<i<<"------>"<<v[i]<<fl;
if(v[i]>0){
if(neg[v[i]].sz()!=0){
// cout<<ans<<" ";
ans+=query( neg[v[i]][0]-1 );
update(neg[v[i]][0],-1);
neg[v[i]].pop_front();
ans+=query(i+1);
// cout<<ans<<fl;
}else{
pos[v[i]].pb(i+1);
update(i+1,1);
}
}else{
if(pos[abs(v[i])].sz()!=0){
// cout<<ans<<" ";
ans+=query( pos[abs(v[i])][0] -1);
update(pos[ abs(v[i])][0],-1);
pos[abs(v[i])].pop_front();
ans+=query(i+1)+1;
// cout<<ans<<fl;
}else{
neg[ abs(v[i]) ].pb(i+1);
update(i+1,1);
}
}
}
return ans;
}
int main(){
vi v={-1,-2,1,-3,-4,4,-1,2,3,1};
cout<<count_swaps(v)<<fl;
}