Submission #1152099

#	Time	Username	Problem	Language	Result	Execution time	Memory
1152099		MPG	Arranging Shoes (IOI19_shoes)	C++20	Compilation error	0 ms	0 KiB

shoes

//#pragma GCC optomize("Ofast")
#pragma GCC optimize("unroll-loops")
//#pragma GCC optimize("O3")
//#pragma GCC target("avx2")
//#pragma GCC target("sse,sse2,sse4.1,sse4.2") 




#include "shoes.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long                           ll;
#define                                     max_heap priority_queue<pair <ll, pair <ll, ll>>>
#define                                     min_heap priority_queue<pair <ll, pair <ll, ll>>, vector<pair <ll, pair <ll, ll>>>, greater<pair <ll, pair <ll, ll>>>>
//#define                                     min_heap priority_queue<ll, vector<ll>, greater<ll>>
#define                                     sariE cin.tie(NULL); cout.tie(NULL); ios_base::sync_with_stdio(false);
#define                                     filE freopen("in.txt", "r", stdin); freopen("out1.txt", "w", stdout); 
#define                                     endl '\n'
#define                                     md(a) (a % mod + mod) % mod
#define pb push_back
//cout << vectorprecision(5) << fixed << f;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

ll const maxn = 2e5 + 123;
ll const inf = 2e18;
ll const loG = 23;
ll const mod = 1e9 + 7;
//ll const mod = 998244353;
ll const sq = 350;
ll power(ll a, ll b, ll mod){if(b==0)return 1;if(b==1)return a;ll x = power(a, b / 2, mod);return (((x * x) % mod) * (b % 2 ? a : 1)) % mod;}




ll n, bit[maxn], ans, cnt = maxn;
queue <ll> chap[maxn], rast[maxn];
bool mark[maxn]; 

ll sum(ll i){
    ll ans = 0;
    for (i += 2; i > 0; i -= (i & (-i)))
        ans += bit[i]; 
    return ans;
}
void adder(ll i, ll val){
    for (i += 2; i <= maxn; i += (i & (-i)))
        bit[i] += val;
}

ll summer(ll l, ll r){
    return sum(r) - sum(l - 1);
}

ll count_swaps(vector<ll> s){

    for (int i = 0; i < s.size(); i++){
        if (s[i] > 0){
            rast[s[i]].push(i);
        }
        else
            chap[-s[i]].push(i);
    }   
    for (int i = 0; i < s.size(); i++){
        if (mark[i])
            continue;
        mark[i] = 1;
        ll j;
        if (s[i] < 0){
            chap[abs(s[i])].pop();
            j = rast[abs(s[i])].front();
            rast[abs(s[i])].pop();
        }
        else{
            rast[s[i]].pop();
            j = chap[s[i]].front();
            chap[s[i]].pop();
        }
        mark[j] = 1;
        ll chand = summer(i, j);
        //cout << i << ' ' << j << ' ' << chand << endl;
        if (s[i] < 0)
            ans += j - i - 1 - chand;
        else
            ans += j - i - chand;
        adder(i, 1);
        adder(j, 1);
    }
    return ans;
}




vector <ll> tmp;

void Solve(){

cin >> n;
for (int i = 1; i < n + 1; i++){
    ll x; cin >> x;
    tmp.push_back(x);
}
cout << count_swaps(tmp) << endl;


}



int main(){
sariE;// filE;



int test = 1;
//cin >> test;
while (test--) Solve();
return 0;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccMbuqLP.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/cci24YDC.o:shoes.cpp:(.text.startup+0x20): first defined here
/usr/bin/ld: /tmp/ccMbuqLP.o: in function `main':
grader.cpp:(.text.startup+0x289): undefined reference to `count_swaps(std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status