oj.uz

Submission #626048

# Submission time Handle Problem Language Result Execution time Memory
626048 2022-08-11T07:27:56 Z Soul234 Making Friends on Joitter is Fun (JOI20_joitter2) C++14
17 / 100
 105 ms 39252 KB 
#include<bits/stdc++.h>
using namespace std;

void DBG() { cerr << "]\n"; }
template<class H, class... T> void DBG(H h, T... t) {
    cerr << h; if(sizeof...(t)) cerr << ", ";
    DBG(t...);
}
#ifdef LOCAL
#define dbg(...) cerr << "[" << #__VA_ARGS__ << "]: [", DBG(__VA_ARGS__)
#else
#define dbg(...) 0
#endif // LOCAL

#define FOR(i,a,b) for(int i = (a) ; i<(b) ; i++)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for(int i = (b)-1 ; i>=(a) ; i--)
#define R0F(i,a) ROF(i,0,a)
#define each(e,a) for(auto &e : (a))
#define sz(v) (int)(v).size()
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define pb push_back
#define tcT template<class T
#define nl "\n"
#define fi first
#define se second
#define ins insert

using ll = long long;
using vi = vector<int>;
using pi = pair<int,int>;
using str = string;
tcT> using V = vector<T>;
tcT> using pqg = priority_queue<T,vector<T>,greater<T>>;

void setIO(string NAME = "") {
    cin.tie(0)->sync_with_stdio(0);
    if(sz(NAME)) {
        freopen((NAME + ".inp").c_str(),"r",stdin);
        freopen((NAME + ".out").c_str(),"w",stdout);
    }
}

tcT> bool ckmin(T&a, const T&b) {
    return b < a ? a=b,1 : 0; }
tcT> bool ckmax(T&a, const T&b) {
    return b > a ? a=b,1 : 0; }

const int MOD = 1e9 + 7;
const int MX = 1e5+5;

struct UF {
    int N; vi e;
    queue<pi> q;
    set<int> adj[MX], radj[MX], fl_ers[MX];
    ll curans = 0;
    void init(int _N) {
        N = _N;
        e.assign(N + 1, -1);
        FOR(i, 1, N+1) {
            fl_ers[i].ins(i);
        }
    }
    int find(int x) { return e[x] < 0 ? x : e[x] = find(e[x]); }

    int get_size(int x) { return sz(adj[x]) + sz(radj[x]) + sz(fl_ers[x]); }

    void insFollow(int a, int b) {
        adj[a].ins(b);
        radj[b].ins(a);
        if(adj[b].count(a)) q.push({a, b});
    }

    void join(int a, int b) {
        if(a == b) return;

        if(get_size(a) < get_size(b)) swap(a, b);

        curans += -1LL*e[a]*sz(fl_ers[b]) - 1LL*e[b]*sz(fl_ers[a]);

        e[a] += e[b];
        e[b] = a;

        each(v, fl_ers[b]) {
            if(fl_ers[a].count(v)) curans += e[a];
            else fl_ers[a].ins(v);
        }

        assert(adj[a].count(b) && adj[b].count(a));
        assert(radj[a].count(b) && radj[b].count(a));

        adj[a].erase(b); radj[a].erase(b);
        adj[b].erase(a); radj[b].erase(a);

        each(v, adj[b]) {
            assert(radj[v].count(b));
            radj[v].erase(b);
            insFollow(a, v);
        }

        each(v, radj[b]) {
            assert(adj[v].count(b));
            adj[v].erase(b);
            insFollow(v, a);
        }
    }

    void query_upd(int a, int b) {
        b = find(b);
        if(find(a) == b || fl_ers[b].count(a)) return;
        fl_ers[b].ins(a);
        curans -= e[b];

        a = find(a);
        insFollow(a, b);

        while(!q.empty()) {
            tie(a, b) = q.front();
            q.pop();
            join(find(a), find(b));
        }
    }
};

int N, M;
UF dsu;

void solve() {
    cin >> N >> M;
    dsu.init(N+5);
    while(M-- > 0) {
        int a, b;
        cin >> a >> b;
        dsu.query_upd(a, b);
        cout << dsu.curans << nl;
    }
}

int main() {
    setIO();

    int t=1;
    //cin>>t;
    while(t-->0) {
        solve();
    }

    return 0;
}

Compilation message

joitter2.cpp: In function 'void setIO(std::string)':
joitter2.cpp:40:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |         freopen((NAME + ".inp").c_str(),"r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
joitter2.cpp:41:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |         freopen((NAME + ".out").c_str(),"w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 14292 KB Output is correct
2 Correct 7 ms 14292 KB Output is correct
3 Correct 7 ms 14292 KB Output is correct
4 Correct 7 ms 14420 KB Output is correct
5 Correct 7 ms 14292 KB Output is correct
6 Correct 7 ms 14320 KB Output is correct
7 Correct 7 ms 14420 KB Output is correct
8 Correct 10 ms 14452 KB Output is correct
9 Correct 9 ms 14452 KB Output is correct
10 Correct 7 ms 14292 KB Output is correct
11 Correct 7 ms 14420 KB Output is correct
12 Correct 7 ms 14292 KB Output is correct
13 Correct 8 ms 14292 KB Output is correct
14 Correct 7 ms 14420 KB Output is correct
15 Correct 8 ms 14292 KB Output is correct
16 Correct 9 ms 14412 KB Output is correct
17 Correct 8 ms 14412 KB Output is correct
18 Correct 7 ms 14420 KB Output is correct
19 Correct 9 ms 14320 KB Output is correct
20 Correct 8 ms 14420 KB Output is correct
21 Correct 11 ms 14420 KB Output is correct
22 Correct 8 ms 14420 KB Output is correct
23 Correct 7 ms 14420 KB Output is correct
24 Correct 7 ms 14420 KB Output is correct
25 Correct 8 ms 14384 KB Output is correct
26 Correct 7 ms 14412 KB Output is correct
27 Correct 7 ms 14420 KB Output is correct
28 Correct 8 ms 14420 KB Output is correct
29 Correct 8 ms 14420 KB Output is correct
30 Correct 7 ms 14416 KB Output is correct
31 Correct 8 ms 14416 KB Output is correct
32 Correct 8 ms 14420 KB Output is correct
33 Correct 10 ms 14372 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 14292 KB Output is correct
2 Correct 7 ms 14292 KB Output is correct
3 Correct 7 ms 14292 KB Output is correct
4 Correct 7 ms 14420 KB Output is correct
5 Correct 7 ms 14292 KB Output is correct
6 Correct 7 ms 14320 KB Output is correct
7 Correct 7 ms 14420 KB Output is correct
8 Correct 10 ms 14452 KB Output is correct
9 Correct 9 ms 14452 KB Output is correct
10 Correct 7 ms 14292 KB Output is correct
11 Correct 7 ms 14420 KB Output is correct
12 Correct 7 ms 14292 KB Output is correct
13 Correct 8 ms 14292 KB Output is correct
14 Correct 7 ms 14420 KB Output is correct
15 Correct 8 ms 14292 KB Output is correct
16 Correct 9 ms 14412 KB Output is correct
17 Correct 8 ms 14412 KB Output is correct
18 Correct 7 ms 14420 KB Output is correct
19 Correct 9 ms 14320 KB Output is correct
20 Correct 8 ms 14420 KB Output is correct
21 Correct 11 ms 14420 KB Output is correct
22 Correct 8 ms 14420 KB Output is correct
23 Correct 7 ms 14420 KB Output is correct
24 Correct 7 ms 14420 KB Output is correct
25 Correct 8 ms 14384 KB Output is correct
26 Correct 7 ms 14412 KB Output is correct
27 Correct 7 ms 14420 KB Output is correct
28 Correct 8 ms 14420 KB Output is correct
29 Correct 8 ms 14420 KB Output is correct
30 Correct 7 ms 14416 KB Output is correct
31 Correct 8 ms 14416 KB Output is correct
32 Correct 8 ms 14420 KB Output is correct
33 Correct 10 ms 14372 KB Output is correct
34 Correct 10 ms 14520 KB Output is correct
35 Correct 73 ms 17876 KB Output is correct
36 Correct 103 ms 20396 KB Output is correct
37 Correct 100 ms 20528 KB Output is correct
38 Correct 100 ms 20284 KB Output is correct
39 Correct 10 ms 14676 KB Output is correct
40 Correct 11 ms 15072 KB Output is correct
41 Correct 11 ms 15060 KB Output is correct
42 Correct 9 ms 14676 KB Output is correct
43 Correct 11 ms 14676 KB Output is correct
44 Correct 11 ms 14684 KB Output is correct
45 Correct 10 ms 14740 KB Output is correct
46 Correct 9 ms 14656 KB Output is correct
47 Correct 11 ms 14932 KB Output is correct
48 Correct 11 ms 14932 KB Output is correct
49 Correct 16 ms 15544 KB Output is correct
50 Correct 105 ms 20620 KB Output is correct
51 Correct 16 ms 15020 KB Output is correct
52 Correct 82 ms 18852 KB Output is correct
53 Correct 17 ms 15484 KB Output is correct
54 Correct 93 ms 19724 KB Output is correct
55 Correct 16 ms 15060 KB Output is correct
56 Correct 12 ms 15100 KB Output is correct
57 Correct 13 ms 15112 KB Output is correct
58 Correct 14 ms 15112 KB Output is correct
59 Correct 11 ms 15104 KB Output is correct
60 Correct 71 ms 17432 KB Output is correct
61 Correct 12 ms 14960 KB Output is correct
62 Correct 90 ms 19996 KB Output is correct

Subtask #3
0 / 83.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 14292 KB Output is correct
2 Correct 7 ms 14292 KB Output is correct
3 Correct 7 ms 14292 KB Output is correct
4 Correct 7 ms 14420 KB Output is correct
5 Correct 7 ms 14292 KB Output is correct
6 Correct 7 ms 14320 KB Output is correct
7 Correct 7 ms 14420 KB Output is correct
8 Correct 10 ms 14452 KB Output is correct
9 Correct 9 ms 14452 KB Output is correct
10 Correct 7 ms 14292 KB Output is correct
11 Correct 7 ms 14420 KB Output is correct
12 Correct 7 ms 14292 KB Output is correct
13 Correct 8 ms 14292 KB Output is correct
14 Correct 7 ms 14420 KB Output is correct
15 Correct 8 ms 14292 KB Output is correct
16 Correct 9 ms 14412 KB Output is correct
17 Correct 8 ms 14412 KB Output is correct
18 Correct 7 ms 14420 KB Output is correct
19 Correct 9 ms 14320 KB Output is correct
20 Correct 8 ms 14420 KB Output is correct
21 Correct 11 ms 14420 KB Output is correct
22 Correct 8 ms 14420 KB Output is correct
23 Correct 7 ms 14420 KB Output is correct
24 Correct 7 ms 14420 KB Output is correct
25 Correct 8 ms 14384 KB Output is correct
26 Correct 7 ms 14412 KB Output is correct
27 Correct 7 ms 14420 KB Output is correct
28 Correct 8 ms 14420 KB Output is correct
29 Correct 8 ms 14420 KB Output is correct
30 Correct 7 ms 14416 KB Output is correct
31 Correct 8 ms 14416 KB Output is correct
32 Correct 8 ms 14420 KB Output is correct
33 Correct 10 ms 14372 KB Output is correct
34 Correct 10 ms 14520 KB Output is correct
35 Correct 73 ms 17876 KB Output is correct
36 Correct 103 ms 20396 KB Output is correct
37 Correct 100 ms 20528 KB Output is correct
38 Correct 100 ms 20284 KB Output is correct
39 Correct 10 ms 14676 KB Output is correct
40 Correct 11 ms 15072 KB Output is correct
41 Correct 11 ms 15060 KB Output is correct
42 Correct 9 ms 14676 KB Output is correct
43 Correct 11 ms 14676 KB Output is correct
44 Correct 11 ms 14684 KB Output is correct
45 Correct 10 ms 14740 KB Output is correct
46 Correct 9 ms 14656 KB Output is correct
47 Correct 11 ms 14932 KB Output is correct
48 Correct 11 ms 14932 KB Output is correct
49 Correct 16 ms 15544 KB Output is correct
50 Correct 105 ms 20620 KB Output is correct
51 Correct 16 ms 15020 KB Output is correct
52 Correct 82 ms 18852 KB Output is correct
53 Correct 17 ms 15484 KB Output is correct
54 Correct 93 ms 19724 KB Output is correct
55 Correct 16 ms 15060 KB Output is correct
56 Correct 12 ms 15100 KB Output is correct
57 Correct 13 ms 15112 KB Output is correct
58 Correct 14 ms 15112 KB Output is correct
59 Correct 11 ms 15104 KB Output is correct
60 Correct 71 ms 17432 KB Output is correct
61 Correct 12 ms 14960 KB Output is correct
62 Correct 90 ms 19996 KB Output is correct
63 Runtime error 29 ms 39252 KB Execution killed with signal 11
64 Halted 0 ms 0 KB -