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답안 #533188

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
533188 2022-03-05T05:47:35 Z balbit 조이터에서 친구를 만드는건 재밌어 (JOI20_joitter2) C++14
17 / 100
 419 ms 72388 KB 
#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define pii pair<ll, ll>
#define f first
#define s second

#define REP(i,n) for (int i = 0; i<n; ++i)
#define REP1(i,n) for (int i = 1; i<=n; ++i)

#define pb push_back
#define SZ(x) (int)((x).size())
#define ALL(x) (x).begin(), (x).end()

#define MX(a,b) a = max(a,b)
#define MN(a,b) a = min(a,b)

#ifdef BALBIT
template<typename T> void _do(T && x){cerr<<x<<endl;}
template<typename T, typename ...S> void _do(T && x, S && ...y){cerr<<x<<", "; _do(y...);}
#define bug(...) cerr<<"#"<<__LINE__<<"- "<<#__VA_ARGS__<<": ", _do(__VA_ARGS__)
#else
#define bug(...)
#define endl '\n'
#endif // BALBIT

const int maxn = 1e5+5;
int par[maxn];
int sz[maxn];
set<int> here[maxn];
set<int> ing[maxn];
set<int> outg[maxn]; // which sets point out of me
set<int> intopt[maxn]; // which individual points point into me
int find(int x) {
    return x == par[x]? x : par[x] = find(par[x]);
}

int re = 0;

queue<pii> tomerge;

void mrg(int A, int B){
    A = find(A); B= find(B);
    if (A == B) return;
    bug(A,B);
    re -= SZ(intopt[B]) * sz[B] + SZ(intopt[A]) * sz[A];
    re -= (sz[B]) * (sz[B]-1) + (sz[A] * (sz[A]-1));
    if (SZ(here[B]) < SZ(intopt[A])) {
        for (int x : here[B]) {
            if (intopt[A].count(x)) intopt[A].erase(x);
        }
    }else{
        set<int> nset;
        for( int x : intopt[A]) {
            if (!here[B].count(x)) {
                nset.insert(x);
            }
        }
        intopt[A].swap(nset);
    }

    if (SZ(here[A]) < SZ(intopt[B])) {
        for (int x : here[A]) {
            if (intopt[B].count(x)) intopt[B].erase(x);
        }
    }else{
        set<int> nset;
        for( int x : intopt[B]) {
            if (!here[A].count(x)) {
                nset.insert(x);
            }
        }
        intopt[B].swap(nset);
    }

    if (SZ(intopt[A]) + SZ(here[A]) + SZ(outg[A]) + SZ(ing[A]) > SZ(intopt[B]) + SZ(here[B]) + SZ(outg[B]) + SZ(ing[B])) {
        swap(A,B); //swapped = 1;
    }
    // a into b

    for (int x : intopt[A]) {
        intopt[B].insert(x);
    }

    for (int x : here[A]) {
        here[B].insert(x);
    }

    for (int x : outg[A]) {
        if (x != B) {
            outg[B].insert(x);
            ing[x].erase(A); ing[x].insert(B);
            if (ing[B].count(x)) {
                bug("bruh? ", A, B, x);
                tomerge.push({B,x});
            }
        }
    }

    for (int x : ing[A]) {
        if (x != B) {
            ing[B].insert(x);
            outg[x].erase(A); outg[x].insert(B);
            if (outg[B].count(x)) {
                bug("yo? ", A, B, x);
                tomerge.push({B,x});
            }
        }
    }

    outg[B].erase(A);
    ing[B].erase(A);

    sz[B] += sz[A];
    par[A] = B;
    bug(SZ(intopt[B]));
    re += SZ(intopt[B]) * sz[B];
    re += (sz[B] * (sz[B]-1));
    bug(re);
}

void add(int a, int b) { // edge from A to B
    int A = find(a), B = find(b);
    if (A == B) return;
    if (intopt[B].count(a)) return;

    if (outg[B].count(A)) {
        // merge sequence!
        bool swapped = 0;
        tomerge.push({A,B});
        while (!tomerge.empty()) {
            mrg(tomerge.front().f, tomerge.front().s);
            tomerge.pop();
        }
    }else{
        ing[B].insert(A);
        outg[A].insert(B);
        intopt[B].insert(a);

        re += sz[B];
    }

}

signed main(){
    ios::sync_with_stdio(0), cin.tie(0);
    bug(1,2);
    int n,m; cin>>n>>m;
    REP(i,n) {
        par[i] = i; sz[i] = 1; here[i].insert(i);
    }

    REP(i,m) {
        int a,b; cin>>a>>b; --a; --b;
        add(a,b);
        cout<<re<<endl;
    }
}

Compilation message

joitter2.cpp: In function 'void add(int, int)':
joitter2.cpp:130:14: warning: unused variable 'swapped' [-Wunused-variable]
  130 |         bool swapped = 0;
      |              ^~~~~~~

Subtask #1
1.0 / 1.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 19104 KB Output is correct
2 Correct 10 ms 19084 KB Output is correct
3 Correct 9 ms 19020 KB Output is correct
4 Correct 9 ms 19020 KB Output is correct
5 Correct 9 ms 19036 KB Output is correct
6 Correct 10 ms 19148 KB Output is correct
7 Correct 10 ms 19148 KB Output is correct
8 Correct 13 ms 19192 KB Output is correct
9 Correct 10 ms 19148 KB Output is correct
10 Correct 12 ms 19112 KB Output is correct
11 Correct 10 ms 19124 KB Output is correct
12 Correct 10 ms 19028 KB Output is correct
13 Correct 11 ms 19108 KB Output is correct
14 Correct 9 ms 19020 KB Output is correct
15 Correct 9 ms 19064 KB Output is correct
16 Correct 9 ms 19020 KB Output is correct
17 Correct 9 ms 19020 KB Output is correct
18 Correct 10 ms 19020 KB Output is correct
19 Correct 9 ms 19108 KB Output is correct
20 Correct 9 ms 19016 KB Output is correct
21 Correct 10 ms 19120 KB Output is correct
22 Correct 13 ms 19112 KB Output is correct
23 Correct 10 ms 19148 KB Output is correct
24 Correct 13 ms 19148 KB Output is correct
25 Correct 13 ms 19148 KB Output is correct
26 Correct 10 ms 19020 KB Output is correct
27 Correct 10 ms 19020 KB Output is correct
28 Correct 9 ms 19020 KB Output is correct
29 Correct 9 ms 19020 KB Output is correct
30 Correct 10 ms 19108 KB Output is correct
31 Correct 12 ms 19120 KB Output is correct
32 Correct 9 ms 19020 KB Output is correct
33 Correct 10 ms 19112 KB Output is correct

Subtask #2
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 19104 KB Output is correct
2 Correct 10 ms 19084 KB Output is correct
3 Correct 9 ms 19020 KB Output is correct
4 Correct 9 ms 19020 KB Output is correct
5 Correct 9 ms 19036 KB Output is correct
6 Correct 10 ms 19148 KB Output is correct
7 Correct 10 ms 19148 KB Output is correct
8 Correct 13 ms 19192 KB Output is correct
9 Correct 10 ms 19148 KB Output is correct
10 Correct 12 ms 19112 KB Output is correct
11 Correct 10 ms 19124 KB Output is correct
12 Correct 10 ms 19028 KB Output is correct
13 Correct 11 ms 19108 KB Output is correct
14 Correct 9 ms 19020 KB Output is correct
15 Correct 9 ms 19064 KB Output is correct
16 Correct 9 ms 19020 KB Output is correct
17 Correct 9 ms 19020 KB Output is correct
18 Correct 10 ms 19020 KB Output is correct
19 Correct 9 ms 19108 KB Output is correct
20 Correct 9 ms 19016 KB Output is correct
21 Correct 10 ms 19120 KB Output is correct
22 Correct 13 ms 19112 KB Output is correct
23 Correct 10 ms 19148 KB Output is correct
24 Correct 13 ms 19148 KB Output is correct
25 Correct 13 ms 19148 KB Output is correct
26 Correct 10 ms 19020 KB Output is correct
27 Correct 10 ms 19020 KB Output is correct
28 Correct 9 ms 19020 KB Output is correct
29 Correct 9 ms 19020 KB Output is correct
30 Correct 10 ms 19108 KB Output is correct
31 Correct 12 ms 19120 KB Output is correct
32 Correct 9 ms 19020 KB Output is correct
33 Correct 10 ms 19112 KB Output is correct
34 Correct 12 ms 19276 KB Output is correct
35 Correct 85 ms 24928 KB Output is correct
36 Correct 108 ms 27856 KB Output is correct
37 Correct 107 ms 28064 KB Output is correct
38 Correct 98 ms 27464 KB Output is correct
39 Correct 11 ms 19384 KB Output is correct
40 Correct 12 ms 19788 KB Output is correct
41 Correct 14 ms 19748 KB Output is correct
42 Correct 12 ms 19404 KB Output is correct
43 Correct 13 ms 19404 KB Output is correct
44 Correct 13 ms 19404 KB Output is correct
45 Correct 11 ms 19380 KB Output is correct
46 Correct 11 ms 19380 KB Output is correct
47 Correct 13 ms 19676 KB Output is correct
48 Correct 13 ms 19632 KB Output is correct
49 Correct 19 ms 20368 KB Output is correct
50 Correct 107 ms 28100 KB Output is correct
51 Correct 19 ms 19736 KB Output is correct
52 Correct 90 ms 26152 KB Output is correct
53 Correct 19 ms 20300 KB Output is correct
54 Correct 100 ms 27088 KB Output is correct
55 Correct 15 ms 19916 KB Output is correct
56 Correct 20 ms 19892 KB Output is correct
57 Correct 15 ms 19900 KB Output is correct
58 Correct 15 ms 19892 KB Output is correct
59 Correct 16 ms 19788 KB Output is correct
60 Correct 79 ms 24772 KB Output is correct
61 Correct 13 ms 19644 KB Output is correct
62 Correct 108 ms 27436 KB Output is correct

Subtask #3
0 / 83.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 19104 KB Output is correct
2 Correct 10 ms 19084 KB Output is correct
3 Correct 9 ms 19020 KB Output is correct
4 Correct 9 ms 19020 KB Output is correct
5 Correct 9 ms 19036 KB Output is correct
6 Correct 10 ms 19148 KB Output is correct
7 Correct 10 ms 19148 KB Output is correct
8 Correct 13 ms 19192 KB Output is correct
9 Correct 10 ms 19148 KB Output is correct
10 Correct 12 ms 19112 KB Output is correct
11 Correct 10 ms 19124 KB Output is correct
12 Correct 10 ms 19028 KB Output is correct
13 Correct 11 ms 19108 KB Output is correct
14 Correct 9 ms 19020 KB Output is correct
15 Correct 9 ms 19064 KB Output is correct
16 Correct 9 ms 19020 KB Output is correct
17 Correct 9 ms 19020 KB Output is correct
18 Correct 10 ms 19020 KB Output is correct
19 Correct 9 ms 19108 KB Output is correct
20 Correct 9 ms 19016 KB Output is correct
21 Correct 10 ms 19120 KB Output is correct
22 Correct 13 ms 19112 KB Output is correct
23 Correct 10 ms 19148 KB Output is correct
24 Correct 13 ms 19148 KB Output is correct
25 Correct 13 ms 19148 KB Output is correct
26 Correct 10 ms 19020 KB Output is correct
27 Correct 10 ms 19020 KB Output is correct
28 Correct 9 ms 19020 KB Output is correct
29 Correct 9 ms 19020 KB Output is correct
30 Correct 10 ms 19108 KB Output is correct
31 Correct 12 ms 19120 KB Output is correct
32 Correct 9 ms 19020 KB Output is correct
33 Correct 10 ms 19112 KB Output is correct
34 Correct 12 ms 19276 KB Output is correct
35 Correct 85 ms 24928 KB Output is correct
36 Correct 108 ms 27856 KB Output is correct
37 Correct 107 ms 28064 KB Output is correct
38 Correct 98 ms 27464 KB Output is correct
39 Correct 11 ms 19384 KB Output is correct
40 Correct 12 ms 19788 KB Output is correct
41 Correct 14 ms 19748 KB Output is correct
42 Correct 12 ms 19404 KB Output is correct
43 Correct 13 ms 19404 KB Output is correct
44 Correct 13 ms 19404 KB Output is correct
45 Correct 11 ms 19380 KB Output is correct
46 Correct 11 ms 19380 KB Output is correct
47 Correct 13 ms 19676 KB Output is correct
48 Correct 13 ms 19632 KB Output is correct
49 Correct 19 ms 20368 KB Output is correct
50 Correct 107 ms 28100 KB Output is correct
51 Correct 19 ms 19736 KB Output is correct
52 Correct 90 ms 26152 KB Output is correct
53 Correct 19 ms 20300 KB Output is correct
54 Correct 100 ms 27088 KB Output is correct
55 Correct 15 ms 19916 KB Output is correct
56 Correct 20 ms 19892 KB Output is correct
57 Correct 15 ms 19900 KB Output is correct
58 Correct 15 ms 19892 KB Output is correct
59 Correct 16 ms 19788 KB Output is correct
60 Correct 79 ms 24772 KB Output is correct
61 Correct 13 ms 19644 KB Output is correct
62 Correct 108 ms 27436 KB Output is correct
63 Correct 413 ms 72204 KB Output is correct
64 Correct 418 ms 72208 KB Output is correct
65 Correct 419 ms 72388 KB Output is correct
66 Incorrect 189 ms 38340 KB Output isn't correct
67 Halted 0 ms 0 KB -