| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 1155463 | at128 | Arranging Shoes (IOI19_shoes) | C++20 | 0 ms | 0 KiB |
#include "shoes.h"
#include<bits/stdc++.h>
#include<vector>
#include<map>
#include<iostream>
using namespace std;
void __print(int x) {cerr << x;}
void __print(long x) {cerr << x;}
void __print(long long x) {cerr << x;}
void __print(unsigned x) {cerr << x;}
void __print(unsigned long x) {cerr << x;}
void __print(unsigned long long x) {cerr << x;}
void __print(float x) {cerr << x;}
void __print(double x) {cerr << x;}
void __print(long double x) {cerr << x;}
void __print(char x) {cerr << '\'' << x << '\'';}
void __print(const char *x) {cerr << '\"' << x << '\"';}
void __print(const string &x) {cerr << '\"' << x << '\"';}
void __print(bool x) {cerr << (x ? "true" : "false");}
template<typename T, typename V>
void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? "," : ""), __print(i); cerr << "}";}
void _print() {cerr << "]\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
#ifndef ONLINE_JUDGE
#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
#else
#define debug(x...)
#endif
#define all(v) ((v).begin()), ((v).end())
#define sz(v) ((int)((v).size()))
#define pb push_back
typedef long long ll;
long long count_swaps(std::vector<int> s) {
int n;
n=s.size()/2;
vector<int>v(2*n);
map<int,set<int>>m;
for(int i=0;i<2*n;i++){
v[i]=s[i];
m[v[i]].insert(i);
}
ll res=0,c=0;
vector<int>s;
for(int i=0;i<2*n;i++){
if(v[i]==INT_MAX){
continue;
}
if(v[i]>0){
int j=*m[-v[i]].begin();
v[j]=INT_MAX;
int p1=(s.end()- lower_bound(all(s),i));
int p2=(s.end()- lower_bound(all(s),j));
s.pb(j);
m[-v[i]].erase(m[-v[i]].begin());
res+=(j-i-(p2-p1));
}else{
int j=*m[-v[i]].begin();
v[j]=INT_MAX;
int p1=(s.end()-lower_bound(all(s),i));
int p2=(s.end()- lower_bound(all(s),j));
s.pb(j);
m[-v[i]].erase(m[-v[i]].begin());
res+=(j-i-(p2-p1)-1);
}
m[v[i]].erase(i);
}
return res;
}