답안 #258624

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
258624	2020-08-06T09:23:37 Z	Diuven	Joker (BOI20_joker)	C++14	6 / 100	2000 ms	7788 KB

Joker

#include <bits/stdc++.h>
using namespace std;
typedef pair<int, int> pii;
const int MAX = 200010;
struct edge_t { int u, v; };
struct stat_t { int x, p, s, b; };
inline int _min(int a, int b){ return a<b ? a : b; }
inline int _max(int a, int b){ return a>b ? a : b; }


class bipuf {
    bool bip;
    int n, U[MAX*2], S[MAX*2];
    vector<stat_t> hist;
    int find(int x){
        return x==U[x] ? x : find(U[x]);
    }
    stat_t unite(int u, int v){
        u = find(u), v = find(v);
        stat_t bef = {0, 0, 0, bip};
        if(u==v) return bef;
        bef = {u, U[u], 0, bip};
        U[u] = v;
        return bef;
    }
    void revert(stat_t st){
        bip = st.b;
        int v = st.x;
        if(v==0) return;
        // S[U[v]] = st.s;
        U[v] = st.p;
    }
public:
    bipuf(int sz){
        bip = true;
        n = 2*sz+1;
        iota(U+1, U+n+1, 1);
        //fill(S+1, S+n+1, 1);
    }
    void add_edge(edge_t e){
        int u = e.u, v = e.v;
        stat_t st1 = unite(u*2, v*2+1);
        stat_t st2 = unite(u*2+1, v*2);
        if(find(u*2) == find(u*2+1) || find(v*2) == find(v*2+1))
            bip = false;
        hist.push_back(st1);
        hist.push_back(st2);
    }
    void pop_edge(){
        stat_t st2 = hist.back(); hist.pop_back();
        stat_t st1 = hist.back(); hist.pop_back();
        revert(st2); revert(st1);
    }
    bool is_bip(){
        return bip;
    }
};

int n, m, q;
edge_t E[MAX];
int pos[MAX];
// pos[l] : using ([1,l] + [pos[l], m]) is bipartite

void solve(int s, int e, int l, int r, bipuf &UF){
    // UF set as [1, s) + (r, m]
    if(e>s) return;
    int mid = (s+e)/2, &p = pos[mid];
    for(int i=_max(1, s); i<=mid; i++)
        UF.add_edge(E[i]);
    // [1, mid] + (r, m]
    int bgn = _min(r, m), fin = _max(l, mid+1);
    for(int i=bgn; i>=fin; i--){
        UF.add_edge(E[i]);
        if(UF.is_bip()) p=i;
    }
    int sto = _min(bgn, p);
    // [1, mid] + [fin, m]
    for(int i=fin; i<=sto; i++)
        UF.pop_edge();
    // [1, mid] + (sto, m]

    solve(s, mid-1, l, p, UF);
    // set UF
    solve(mid+1, e, p, r, UF);
}



int main(){
    ios::sync_with_stdio(0); cin.tie(0);

    cin>>n>>m>>q;

    for(int i=1; i<=m; i++){
        int u, v; cin>>u>>v;
        E[i] = {u, v};
    }
    fill(pos, pos+m+1, m+2);

    static bipuf UF(n);

//    solve(0, m, 1, m+1, UF);

    for(int i=1; i<=q; i++){
        int l, r; cin>>l>>r;
        for(int j=1; j<l; j++)
            UF.add_edge(E[j]);
        for(int j=m; j>r; j--)
            UF.add_edge(E[j]);
        cout<<(UF.is_bip() ? "NO" : "YES")<<'\n';
        for(int j=1; j<l; j++)
            UF.pop_edge();
        for(int j=m; j>r; j--)
            UF.pop_edge();
//        cout<<(pos[l-1] <= r+1 ? "NO" : "YES")<<'\n';
    }

}

Subtask #1
6.0 / 6.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	384 KB	Output is correct
2	Correct	0 ms	384 KB	Output is correct
3	Correct	0 ms	384 KB	Output is correct
4	Correct	1 ms	384 KB	Output is correct
5	Correct	0 ms	384 KB	Output is correct
6	Correct	1 ms	384 KB	Output is correct
7	Correct	1 ms	384 KB	Output is correct
8	Correct	2 ms	384 KB	Output is correct
9	Correct	2 ms	384 KB	Output is correct
10	Correct	3 ms	384 KB	Output is correct
11	Correct	2 ms	512 KB	Output is correct
12	Correct	2 ms	384 KB	Output is correct
13	Correct	4 ms	384 KB	Output is correct
14	Correct	2 ms	384 KB	Output is correct
15	Correct	1 ms	384 KB	Output is correct
16	Correct	2 ms	384 KB	Output is correct
17	Correct	3 ms	384 KB	Output is correct
18	Correct	3 ms	384 KB	Output is correct
19	Correct	3 ms	384 KB	Output is correct
20	Correct	6 ms	384 KB	Output is correct
21	Correct	7 ms	384 KB	Output is correct
22	Correct	6 ms	384 KB	Output is correct
23	Correct	3 ms	384 KB	Output is correct
24	Correct	4 ms	384 KB	Output is correct
25	Correct	2 ms	384 KB	Output is correct
26	Correct	4 ms	384 KB	Output is correct
27	Correct	3 ms	384 KB	Output is correct
28	Correct	3 ms	384 KB	Output is correct

Subtask #2
0 / 8.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	384 KB	Output is correct
2	Correct	0 ms	384 KB	Output is correct
3	Correct	0 ms	384 KB	Output is correct
4	Correct	1 ms	384 KB	Output is correct
5	Correct	0 ms	384 KB	Output is correct
6	Correct	1 ms	384 KB	Output is correct
7	Correct	1 ms	384 KB	Output is correct
8	Correct	2 ms	384 KB	Output is correct
9	Correct	2 ms	384 KB	Output is correct
10	Correct	3 ms	384 KB	Output is correct
11	Correct	2 ms	512 KB	Output is correct
12	Correct	2 ms	384 KB	Output is correct
13	Correct	4 ms	384 KB	Output is correct
14	Correct	2 ms	384 KB	Output is correct
15	Correct	1 ms	384 KB	Output is correct
16	Correct	2 ms	384 KB	Output is correct
17	Correct	3 ms	384 KB	Output is correct
18	Correct	3 ms	384 KB	Output is correct
19	Correct	3 ms	384 KB	Output is correct
20	Correct	6 ms	384 KB	Output is correct
21	Correct	7 ms	384 KB	Output is correct
22	Correct	6 ms	384 KB	Output is correct
23	Correct	3 ms	384 KB	Output is correct
24	Correct	4 ms	384 KB	Output is correct
25	Correct	2 ms	384 KB	Output is correct
26	Correct	4 ms	384 KB	Output is correct
27	Correct	3 ms	384 KB	Output is correct
28	Correct	3 ms	384 KB	Output is correct
29	Correct	47 ms	632 KB	Output is correct
30	Correct	375 ms	512 KB	Output is correct
31	Correct	1210 ms	632 KB	Output is correct
32	Correct	1992 ms	632 KB	Output is correct
33	Execution timed out	2095 ms	512 KB	Time limit exceeded
34	Halted	0 ms	0 KB	-

Subtask #3
0 / 25.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	384 KB	Output is correct
2	Correct	0 ms	384 KB	Output is correct
3	Execution timed out	2078 ms	7788 KB	Time limit exceeded
4	Halted	0 ms	0 KB	-

Subtask #4
0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	384 KB	Output is correct
2	Correct	0 ms	384 KB	Output is correct
3	Correct	0 ms	384 KB	Output is correct
4	Correct	1 ms	384 KB	Output is correct
5	Correct	0 ms	384 KB	Output is correct
6	Correct	1 ms	384 KB	Output is correct
7	Correct	1 ms	384 KB	Output is correct
8	Correct	2 ms	384 KB	Output is correct
9	Correct	2 ms	384 KB	Output is correct
10	Correct	3 ms	384 KB	Output is correct
11	Correct	2 ms	512 KB	Output is correct
12	Correct	2 ms	384 KB	Output is correct
13	Correct	4 ms	384 KB	Output is correct
14	Correct	2 ms	384 KB	Output is correct
15	Correct	1 ms	384 KB	Output is correct
16	Correct	2 ms	384 KB	Output is correct
17	Correct	3 ms	384 KB	Output is correct
18	Correct	3 ms	384 KB	Output is correct
19	Correct	3 ms	384 KB	Output is correct
20	Correct	6 ms	384 KB	Output is correct
21	Correct	7 ms	384 KB	Output is correct
22	Correct	6 ms	384 KB	Output is correct
23	Correct	3 ms	384 KB	Output is correct
24	Correct	4 ms	384 KB	Output is correct
25	Correct	2 ms	384 KB	Output is correct
26	Correct	4 ms	384 KB	Output is correct
27	Correct	3 ms	384 KB	Output is correct
28	Correct	3 ms	384 KB	Output is correct
29	Execution timed out	2078 ms	7788 KB	Time limit exceeded
30	Halted	0 ms	0 KB	-

Subtask #5
0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	384 KB	Output is correct
2	Correct	0 ms	384 KB	Output is correct
3	Correct	0 ms	384 KB	Output is correct
4	Correct	1 ms	384 KB	Output is correct
5	Correct	0 ms	384 KB	Output is correct
6	Correct	1 ms	384 KB	Output is correct
7	Correct	1 ms	384 KB	Output is correct
8	Correct	2 ms	384 KB	Output is correct
9	Correct	2 ms	384 KB	Output is correct
10	Correct	3 ms	384 KB	Output is correct
11	Correct	2 ms	512 KB	Output is correct
12	Correct	2 ms	384 KB	Output is correct
13	Correct	4 ms	384 KB	Output is correct
14	Correct	2 ms	384 KB	Output is correct
15	Correct	1 ms	384 KB	Output is correct
16	Correct	2 ms	384 KB	Output is correct
17	Correct	3 ms	384 KB	Output is correct
18	Correct	3 ms	384 KB	Output is correct
19	Correct	3 ms	384 KB	Output is correct
20	Correct	6 ms	384 KB	Output is correct
21	Correct	7 ms	384 KB	Output is correct
22	Correct	6 ms	384 KB	Output is correct
23	Correct	3 ms	384 KB	Output is correct
24	Correct	4 ms	384 KB	Output is correct
25	Correct	2 ms	384 KB	Output is correct
26	Correct	4 ms	384 KB	Output is correct
27	Correct	3 ms	384 KB	Output is correct
28	Correct	3 ms	384 KB	Output is correct
29	Correct	47 ms	632 KB	Output is correct
30	Correct	375 ms	512 KB	Output is correct
31	Correct	1210 ms	632 KB	Output is correct
32	Correct	1992 ms	632 KB	Output is correct
33	Execution timed out	2095 ms	512 KB	Time limit exceeded
34	Halted	0 ms	0 KB	-

Subtask #6
0 / 29.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	384 KB	Output is correct
2	Correct	0 ms	384 KB	Output is correct
3	Correct	0 ms	384 KB	Output is correct
4	Correct	1 ms	384 KB	Output is correct
5	Correct	0 ms	384 KB	Output is correct
6	Correct	1 ms	384 KB	Output is correct
7	Correct	1 ms	384 KB	Output is correct
8	Correct	2 ms	384 KB	Output is correct
9	Correct	2 ms	384 KB	Output is correct
10	Correct	3 ms	384 KB	Output is correct
11	Correct	2 ms	512 KB	Output is correct
12	Correct	2 ms	384 KB	Output is correct
13	Correct	4 ms	384 KB	Output is correct
14	Correct	2 ms	384 KB	Output is correct
15	Correct	1 ms	384 KB	Output is correct
16	Correct	2 ms	384 KB	Output is correct
17	Correct	3 ms	384 KB	Output is correct
18	Correct	3 ms	384 KB	Output is correct
19	Correct	3 ms	384 KB	Output is correct
20	Correct	6 ms	384 KB	Output is correct
21	Correct	7 ms	384 KB	Output is correct
22	Correct	6 ms	384 KB	Output is correct
23	Correct	3 ms	384 KB	Output is correct
24	Correct	4 ms	384 KB	Output is correct
25	Correct	2 ms	384 KB	Output is correct
26	Correct	4 ms	384 KB	Output is correct
27	Correct	3 ms	384 KB	Output is correct
28	Correct	3 ms	384 KB	Output is correct
29	Correct	47 ms	632 KB	Output is correct
30	Correct	375 ms	512 KB	Output is correct
31	Correct	1210 ms	632 KB	Output is correct
32	Correct	1992 ms	632 KB	Output is correct
33	Execution timed out	2095 ms	512 KB	Time limit exceeded
34	Halted	0 ms	0 KB	-

답안 #258624

Compilation message

Subtask #1 6.0 / 6.0

Subtask #2 0 / 8.0

Subtask #3 0 / 25.0

Subtask #4 0 / 10.0

Subtask #5 0 / 22.0

Subtask #6 0 / 29.0

Subtask #1
6.0 / 6.0

Subtask #2
0 / 8.0

Subtask #3
0 / 25.0

Subtask #4
0 / 10.0

Subtask #5
0 / 22.0

Subtask #6
0 / 29.0