oj.uz

Submission #1091061

# Submission time Handle Problem Language Result Execution time Memory
1091061 2024-09-19T16:28:20 Z steveonalex Making Friends on Joitter is Fun (JOI20_joitter2) C++17
1 / 100
 5000 ms 3120 KB 
#include <bits/stdc++.h>
 
using namespace std;
 
typedef long long ll;
typedef unsigned long long ull;
 
#define MASK(i) (1LL << (i))
#define GETBIT(mask, i) (((mask) >> (i)) & 1)
#define ALL(v) (v).begin(), (v).end()
#define block_of_code if(true)
 
ll max(ll a, ll b){return (a > b) ? a : b;}
ll min(ll a, ll b){return (a < b) ? a : b;}
ll gcd(ll a, ll b){return __gcd(a, b);}
ll lcm(ll a, ll b){return a / gcd(a, b) * b;}
 
ll LASTBIT(ll mask){return (mask) & (-mask);}
int pop_cnt(ll mask){return __builtin_popcountll(mask);}
int ctz(ull mask){return __builtin_ctzll(mask);}
int logOf(ull mask){return 63 - __builtin_clzll(mask);}
 
mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
ll rngesus(ll l, ll r){return l + (ull) rng() % (r - l + 1);}
double rngesus_d(double l, double r){
    double cur = rngesus(0, MASK(60) - 1);
    cur /= MASK(60) - 1;
    return l + cur * (r - l);
}
 
template <class T1, class T2>
    bool maximize(T1 &a, T2 b){
        if (a < b) {a = b; return true;}
        return false;
    }
 
template <class T1, class T2>
    bool minimize(T1 &a, T2 b){
        if (a > b) {a = b; return true;}
        return false;
    }
 
template <class T>
    void printArr(T container, string separator = " ", string finish = "\n", ostream &out = cout){
        for(auto item: container) out << item << separator;
        out << finish;
    }
 
template <class T>
    void remove_dup(vector<T> &a){
        sort(ALL(a));
        a.resize(unique(ALL(a)) - a.begin());
    }

pair<int, int> make_edge(int u, int v){
    if (u <= v) return make_pair(u, v);
    return make_pair(v, u);
}

struct DSU{
    int n;
    vector<int> parent, sz;
    vector<set<int>> S1, S2;
    set<pair<int, int>> pending_merge;

    DSU(int _n){
        n = _n;
        parent.resize(n+1); sz.resize(n+1, 1);
        S1.resize(n+1); S2.resize(n+1);
        for(int i = 1; i<=n; ++i) parent[i] = i;
    }

    int find_set(int u){return (u == parent[u]) ? u : (parent[u] = find_set(parent[u]));}
    bool same_set(int u, int v){return find_set(u) == find_set(v);}

    bool join_set(int u, int v){
        u = find_set(u), v = find_set(v);
        S1[u].erase(v); S2[u].erase(v); 
        S1[v].erase(u); S2[v].erase(u);
        if (u != v){
            if (sz[u] < sz[v]) swap(u, v);
            parent[v] = u;
            sz[u] += sz[v];
            vector<pair<int, int>> pending;
            for(int i: S1[v]) {
                S2[i].erase(v); S2[i].insert(u);
                S1[u].insert(i);
                if (S2[u].find(i) != S2[u].end()) pending_merge.insert({u, i});
            }
            for(int i: S2[v]){
                S1[i].erase(v); S1[i].insert(u);
                S2[u].insert(i);
                if (S1[u].find(i) != S1[u].end()) pending_merge.insert({u, i}); 
            }
            return true;
        }
        return false;
    }

    int get_size(int u){return sz[find_set(u)];}

    void add_edge(int u, int v){
        u = find_set(u), v = find_set(v);
        S1[u].insert(v); S2[v].insert(u);
        if (S2[u].find(v) != S2[u].end()) pending_merge.insert({u, v});

        while(pending_merge.size()){
            int x, y; tie(x, y) = *pending_merge.begin();
            pending_merge.erase(pending_merge.begin());
            join_set(x, y);
        }
    }
};

int main(void){
    ios::sync_with_stdio(0);cin.tie(0); cout.tie(0);
    clock_t start = clock();

    int n, m; cin >> n >> m;

    DSU mst(n);
    vector<pair<int, int>> edge, true_edge;
    for(int i = 0; i<m; ++i){
        int u, v; cin >> u >> v;

        mst.add_edge(u, v);
        true_edge.push_back({u, v});
        ll ans = 0;
        for(int i = 1; i<=n; ++i) if (i == mst.find_set(i)){
            ll cur = mst.get_size(i);
            ans += cur * (cur - 1);
        }

        for(pair<int, int> &i: true_edge) i.second = mst.find_set(i.second);
        remove_dup(true_edge);
        for(pair<int, int> i: true_edge) if (!mst.same_set(i.first, i.second)){
            ans += mst.get_size(i.second);
        }

        cout << ans << "\n";
    }

    cerr << "Time elapsed: " << clock() - start << " ms\n";
    return 0;
}

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 4 ms 344 KB Output is correct
8 Correct 3 ms 348 KB Output is correct
9 Correct 3 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 0 ms 464 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 3 ms 348 KB Output is correct
22 Correct 1 ms 344 KB Output is correct
23 Correct 2 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 2 ms 348 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 2 ms 352 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 2 ms 352 KB Output is correct

Subtask #2
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 4 ms 344 KB Output is correct
8 Correct 3 ms 348 KB Output is correct
9 Correct 3 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 0 ms 464 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 3 ms 348 KB Output is correct
22 Correct 1 ms 344 KB Output is correct
23 Correct 2 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 2 ms 348 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 2 ms 352 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 2 ms 352 KB Output is correct
34 Correct 21 ms 600 KB Output is correct
35 Execution timed out 5095 ms 3120 KB Time limit exceeded
36 Halted 0 ms 0 KB -

Subtask #3
0 / 83.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 4 ms 344 KB Output is correct
8 Correct 3 ms 348 KB Output is correct
9 Correct 3 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 0 ms 464 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 3 ms 348 KB Output is correct
22 Correct 1 ms 344 KB Output is correct
23 Correct 2 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 2 ms 348 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 2 ms 352 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 2 ms 352 KB Output is correct
34 Correct 21 ms 600 KB Output is correct
35 Execution timed out 5095 ms 3120 KB Time limit exceeded
36 Halted 0 ms 0 KB -