Submission #1099404

#	Time	Username	Problem	Language	Result	Execution time	Memory
1099404		Neco_arc	Making Friends on Joitter is Fun (JOI20_joitter2)	C++17	Compilation error	0 ms	0 KiB

joitter2

#include <bits/stdc++.h>
#ifndef ONLINE_JUDGE
#include <C:\debug.hpp>
#endif // ONLINE_JUDGE

#define ll long long
#define ull unsigned long long
#define all(x) x.begin(), x.end()
#define Neco "Joitter"
#define resp(x) sort(all(x)), x.resize(unique(all(x)) - x.begin())
#define getbit(x,i) ((x >> i)&1)
#define _left id * 2, l, mid
#define _right id * 2 + 1, mid + 1, r
#define cntbit(x) __builtin_popcountll(x)
#define fi(i, a, b) for(int i = a; i <= b; i++)
#define fid(i, a, b) for(int i = a; i >= b; i--)
#define maxn (int) 2e5 + 7

using namespace std;

const ll mod = 1e9 + 7; //972663749
const ll base = 911382323;

mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
ll GetRandom(ll l, ll r) {
    return uniform_int_distribution<ll> (l, r)(rng);
}

int n, q; ll ans;
int lab[maxn];
vector<pair<int, int>> Wait;
set<int> In[maxn], Out[maxn], C[maxn];

int get_rt(int u) { return lab[u] < 0 ? u : lab[u] = get_rt(lab[u]); }
int size(int u) { return C[u].size() + In[u].size() + Out[u].size(); }

void Add(int u, int v) {
    u = get_rt(u), v = get_rt(v);
    In[v].insert(u), Out[u].insert(v);
    if(Out[v].count(u)) Wait.push_back({u, v});
}

void uni(int u, int v) {
    u = get_rt(u), v = get_rt(v); if(u == v) return;
    if(size(u) < size(v)) swap(u, v);

    ans += 1ll * (-lab[u] * C[v].size()) + 1ll * (-lab[v] * C[u].size());
    lab[u] += lab[v], lab[v] = u;

    for(int x : C[v]) {
        if(C[u].count(x)) ans -= -lab[u];
        else C[u].insert(x);
    }

    for(int x : In[v]) {
        Out[x].erase(v), Add(x, u);
    }
    for(int x : Out[v]) {
        In[x].erase(v), Add(u, x);
    }

    In[v].clear(), Out[v].clear(), C[v].clear();
}

void solve()
{

    cin >> n >> q;
    fi(i, 1, n) lab[i] = -1, C[i] = {i};

    fi(i, 1, q) {
        int u, v; cin >> u >> v;
        v = get_rt(v);

        if(get_rt(u) != v && !C[v].count(u)) {
            C[v].insert(u), ans += -lab[v];
            u = get_rt(u);

            Add(u, v);
            while(!Wait.empty()) {
                int x, y; tie(x, y) = Wait.back();
                Wait.pop_back();
                uni(x, y);
            }
        }

        cout << ans << '\n';
    }

}


int main()
{

    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    if(fopen(Neco".inp", "r")) {
        freopen(Neco".inp", "r", stdin);
        freopen(Neco".out", "w", stdout);
    }

    int nTest = 1;
//    cin >> nTest;

    while(nTest--)
    {
        solve();
    }


    return 0;
}

Compilation message (stderr)

joitter2.cpp:3:10: fatal error: C:\debug.hpp: No such file or directory
    3 | #include <C:\debug.hpp>
      |          ^~~~~~~~~~~~~~
compilation terminated.