oj.uz

Submission #626047

# Submission time Handle Problem Language Result Execution time Memory
626047 2022-08-11T07:26:48 Z Soul234 Making Friends on Joitter is Fun (JOI20_joitter2) C++14
17 / 100
 128 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);
        }

        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 8 ms 14292 KB Output is correct
3 Correct 8 ms 14292 KB Output is correct
4 Correct 8 ms 14292 KB Output is correct
5 Correct 7 ms 14384 KB Output is correct
6 Correct 7 ms 14292 KB Output is correct
7 Correct 9 ms 14420 KB Output is correct
8 Correct 9 ms 14420 KB Output is correct
9 Correct 9 ms 14420 KB Output is correct
10 Correct 8 ms 14292 KB Output is correct
11 Correct 8 ms 14420 KB Output is correct
12 Correct 9 ms 14420 KB Output is correct
13 Correct 7 ms 14292 KB Output is correct
14 Correct 7 ms 14292 KB Output is correct
15 Correct 7 ms 14344 KB Output is correct
16 Correct 7 ms 14292 KB Output is correct
17 Correct 7 ms 14292 KB Output is correct
18 Correct 7 ms 14308 KB Output is correct
19 Correct 8 ms 14292 KB Output is correct
20 Correct 7 ms 14332 KB Output is correct
21 Correct 8 ms 14420 KB Output is correct
22 Correct 7 ms 14420 KB Output is correct
23 Correct 8 ms 14440 KB Output is correct
24 Correct 8 ms 14352 KB Output is correct
25 Correct 8 ms 14420 KB Output is correct
26 Correct 8 ms 14420 KB Output is correct
27 Correct 10 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 9 ms 14316 KB Output is correct
31 Correct 8 ms 14412 KB Output is correct
32 Correct 9 ms 14412 KB Output is correct
33 Correct 8 ms 14352 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 8 ms 14292 KB Output is correct
3 Correct 8 ms 14292 KB Output is correct
4 Correct 8 ms 14292 KB Output is correct
5 Correct 7 ms 14384 KB Output is correct
6 Correct 7 ms 14292 KB Output is correct
7 Correct 9 ms 14420 KB Output is correct
8 Correct 9 ms 14420 KB Output is correct
9 Correct 9 ms 14420 KB Output is correct
10 Correct 8 ms 14292 KB Output is correct
11 Correct 8 ms 14420 KB Output is correct
12 Correct 9 ms 14420 KB Output is correct
13 Correct 7 ms 14292 KB Output is correct
14 Correct 7 ms 14292 KB Output is correct
15 Correct 7 ms 14344 KB Output is correct
16 Correct 7 ms 14292 KB Output is correct
17 Correct 7 ms 14292 KB Output is correct
18 Correct 7 ms 14308 KB Output is correct
19 Correct 8 ms 14292 KB Output is correct
20 Correct 7 ms 14332 KB Output is correct
21 Correct 8 ms 14420 KB Output is correct
22 Correct 7 ms 14420 KB Output is correct
23 Correct 8 ms 14440 KB Output is correct
24 Correct 8 ms 14352 KB Output is correct
25 Correct 8 ms 14420 KB Output is correct
26 Correct 8 ms 14420 KB Output is correct
27 Correct 10 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 9 ms 14316 KB Output is correct
31 Correct 8 ms 14412 KB Output is correct
32 Correct 9 ms 14412 KB Output is correct
33 Correct 8 ms 14352 KB Output is correct
34 Correct 11 ms 14412 KB Output is correct
35 Correct 78 ms 17928 KB Output is correct
36 Correct 99 ms 20352 KB Output is correct
37 Correct 128 ms 20572 KB Output is correct
38 Correct 102 ms 20060 KB Output is correct
39 Correct 10 ms 14676 KB Output is correct
40 Correct 11 ms 15088 KB Output is correct
41 Correct 11 ms 15060 KB Output is correct
42 Correct 11 ms 14644 KB Output is correct
43 Correct 10 ms 14676 KB Output is correct
44 Correct 10 ms 14676 KB Output is correct
45 Correct 10 ms 14676 KB Output is correct
46 Correct 10 ms 14676 KB Output is correct
47 Correct 12 ms 14932 KB Output is correct
48 Correct 16 ms 14864 KB Output is correct
49 Correct 18 ms 15600 KB Output is correct
50 Correct 104 ms 20624 KB Output is correct
51 Correct 13 ms 14932 KB Output is correct
52 Correct 85 ms 18768 KB Output is correct
53 Correct 19 ms 15444 KB Output is correct
54 Correct 112 ms 19636 KB Output is correct
55 Correct 12 ms 15088 KB Output is correct
56 Correct 13 ms 15072 KB Output is correct
57 Correct 12 ms 15120 KB Output is correct
58 Correct 12 ms 15112 KB Output is correct
59 Correct 11 ms 15060 KB Output is correct
60 Correct 71 ms 17420 KB Output is correct
61 Correct 12 ms 14932 KB Output is correct
62 Correct 104 ms 19928 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 8 ms 14292 KB Output is correct
3 Correct 8 ms 14292 KB Output is correct
4 Correct 8 ms 14292 KB Output is correct
5 Correct 7 ms 14384 KB Output is correct
6 Correct 7 ms 14292 KB Output is correct
7 Correct 9 ms 14420 KB Output is correct
8 Correct 9 ms 14420 KB Output is correct
9 Correct 9 ms 14420 KB Output is correct
10 Correct 8 ms 14292 KB Output is correct
11 Correct 8 ms 14420 KB Output is correct
12 Correct 9 ms 14420 KB Output is correct
13 Correct 7 ms 14292 KB Output is correct
14 Correct 7 ms 14292 KB Output is correct
15 Correct 7 ms 14344 KB Output is correct
16 Correct 7 ms 14292 KB Output is correct
17 Correct 7 ms 14292 KB Output is correct
18 Correct 7 ms 14308 KB Output is correct
19 Correct 8 ms 14292 KB Output is correct
20 Correct 7 ms 14332 KB Output is correct
21 Correct 8 ms 14420 KB Output is correct
22 Correct 7 ms 14420 KB Output is correct
23 Correct 8 ms 14440 KB Output is correct
24 Correct 8 ms 14352 KB Output is correct
25 Correct 8 ms 14420 KB Output is correct
26 Correct 8 ms 14420 KB Output is correct
27 Correct 10 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 9 ms 14316 KB Output is correct
31 Correct 8 ms 14412 KB Output is correct
32 Correct 9 ms 14412 KB Output is correct
33 Correct 8 ms 14352 KB Output is correct
34 Correct 11 ms 14412 KB Output is correct
35 Correct 78 ms 17928 KB Output is correct
36 Correct 99 ms 20352 KB Output is correct
37 Correct 128 ms 20572 KB Output is correct
38 Correct 102 ms 20060 KB Output is correct
39 Correct 10 ms 14676 KB Output is correct
40 Correct 11 ms 15088 KB Output is correct
41 Correct 11 ms 15060 KB Output is correct
42 Correct 11 ms 14644 KB Output is correct
43 Correct 10 ms 14676 KB Output is correct
44 Correct 10 ms 14676 KB Output is correct
45 Correct 10 ms 14676 KB Output is correct
46 Correct 10 ms 14676 KB Output is correct
47 Correct 12 ms 14932 KB Output is correct
48 Correct 16 ms 14864 KB Output is correct
49 Correct 18 ms 15600 KB Output is correct
50 Correct 104 ms 20624 KB Output is correct
51 Correct 13 ms 14932 KB Output is correct
52 Correct 85 ms 18768 KB Output is correct
53 Correct 19 ms 15444 KB Output is correct
54 Correct 112 ms 19636 KB Output is correct
55 Correct 12 ms 15088 KB Output is correct
56 Correct 13 ms 15072 KB Output is correct
57 Correct 12 ms 15120 KB Output is correct
58 Correct 12 ms 15112 KB Output is correct
59 Correct 11 ms 15060 KB Output is correct
60 Correct 71 ms 17420 KB Output is correct
61 Correct 12 ms 14932 KB Output is correct
62 Correct 104 ms 19928 KB Output is correct
63 Runtime error 29 ms 39252 KB Execution killed with signal 11
64 Halted 0 ms 0 KB -