답안 #1093977

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1093977	2024-09-28T08:00:40 Z	simona1230	Joker (BOI20_joker)	C++17	49 / 100	1286 ms	13744 KB

Joker

#include <bits/stdc++.h>

using namespace std;
struct query
{
    int l,r,i;
    query(){}
    query(int _l,int _r,int _i)
    {
        l=_l;
        r=_r;
        i=_i;
    }
};

struct edge
{
    int x,y;
    edge(){}
    edge(int _x,int _y)
    {
        x=_x;
        y=_y;
    }
};

int n,m,k;
query a[200001];
pair<int,int> e[200001],q[200001];

void read()
{
    cin>>n>>m>>k;
    for(int i=1;i<=m;i++)
    {
        int x,y;
        cin>>x>>y;
        e[i]={x,y};
    }

    for(int i=1;i<=k;i++)
    {
        int l,r;
        cin>>l>>r;
        q[i]={l,r};
        a[i]={l,r,i};
    }
}

int used[200001];
vector<int> v[200001];
bool pos;

void dfs(int i)
{
    for(int j=0;j<v[i].size();j++)
    {
        int nb=v[i][j];
        if(!used[nb])
        {
            used[nb]=1;
            if(used[i]==1)used[nb]=2;

            dfs(nb);
        }
        else if(used[i]==used[nb])pos=0;
    }
}

void slow()
{
    for(int i=1;i<=k;i++)
    {
        pos=1;
        for(int j=1;j<=n;j++)
        {
            used[j]=0;
            v[j].clear();
        }

        for(int j=1;j<q[i].first;j++)
        {
            v[e[j].first].push_back(e[j].second);
            v[e[j].second].push_back(e[j].first);
        }

        for(int j=q[i].second+1;j<=m;j++)
        {
            v[e[j].first].push_back(e[j].second);
            v[e[j].second].push_back(e[j].first);
        }

        for(int j=1;j<=n;j++)
        {
            if(!used[j])
            {
                used[j]=1;
                dfs(j);
            }
        }

        if(pos)cout<<"NO"<<endl;
        else cout<<"YES"<<endl;
    }
}


int minr[200001];
int sz[200001];
pair<int,int> p[200001];

void init()
{
    pos=1;
    for(int i=1;i<=n;i++)
        p[i]={i,0},sz[i]=1;
}

pair<int,int> parent(int x)
{
    if(x==p[x].first)return p[x];
    int curr=p[x].second;

    p[x]=parent(p[x].first);
    p[x].second^=curr;
    return p[x];
}

void unite(int x,int y)
{
    pair<int,int> pxx=parent(x);
    pair<int,int> pyy=parent(y);

    int px=pxx.first;
    int py=pyy.first;

    if(px!=py)
    {
        if(sz[px]>sz[py])swap(px,py);

        p[px]={py,{pxx.second^pyy.second^1}};
        sz[py]+=sz[px];
    }
    else
    {
        //cout<<x<<" "<<y<<" "<<pxx.second<<" "<<pyy.second<<endl;
        if(pxx.second%2==pyy.second%2)
            pos=0;
    }
}

void subt()
{
    for(int i=1;i<=min(200,m);i++)
    {
        //cout<<i<<endl;
        init();
        for(int j=1;j<i;j++)
        {
            unite(e[j].first,e[j].second);
            if(pos==0)
            {
                //cout<<"in"<<" "<<i<<" "<<j<<endl;
                minr[i]=m+1;
                break;
            }
        }
        for(int j=m;j>i;j--)
        {
            unite(e[j].first,e[j].second);
            if(pos==0)
            {
                //cout<<"in"<<" "<<i<<" "<<j<<endl;
                minr[i]=max(minr[i],j);
                break;
            }
        }
    }

    for(int i=1;i<=k;i++)
    {
        if(minr[q[i].first]>q[i].second)cout<<"YES"<<endl;
        else cout<<"NO"<<endl;
    }
}

int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cout.tie(NULL);
	read();
	if(n<=2000)slow();
	else subt();
	return 0;
}

Compilation message

Joker.cpp: In function 'void dfs(int)':
Joker.cpp:56:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   56 |     for(int j=0;j<v[i].size();j++)
      |                 ~^~~~~~~~~~~~

Subtask #1
6.0 / 6.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	4952 KB	Output is correct
2	Correct	2 ms	4956 KB	Output is correct
3	Correct	2 ms	4956 KB	Output is correct
4	Correct	2 ms	4952 KB	Output is correct
5	Correct	2 ms	4964 KB	Output is correct
6	Correct	2 ms	4956 KB	Output is correct
7	Correct	3 ms	4956 KB	Output is correct
8	Correct	3 ms	4956 KB	Output is correct
9	Correct	3 ms	4956 KB	Output is correct
10	Correct	4 ms	4956 KB	Output is correct
11	Correct	3 ms	4956 KB	Output is correct
12	Correct	3 ms	4956 KB	Output is correct
13	Correct	2 ms	4956 KB	Output is correct
14	Correct	3 ms	4956 KB	Output is correct
15	Correct	3 ms	5052 KB	Output is correct
16	Correct	3 ms	4956 KB	Output is correct
17	Correct	3 ms	4956 KB	Output is correct
18	Correct	3 ms	4956 KB	Output is correct
19	Correct	3 ms	4956 KB	Output is correct
20	Correct	3 ms	4956 KB	Output is correct
21	Correct	3 ms	4952 KB	Output is correct
22	Correct	3 ms	4956 KB	Output is correct
23	Correct	3 ms	4956 KB	Output is correct
24	Correct	3 ms	4956 KB	Output is correct
25	Correct	3 ms	4956 KB	Output is correct
26	Correct	2 ms	4956 KB	Output is correct
27	Correct	2 ms	4956 KB	Output is correct
28	Correct	3 ms	4956 KB	Output is correct

Subtask #2
8.0 / 8.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	4952 KB	Output is correct
2	Correct	2 ms	4956 KB	Output is correct
3	Correct	2 ms	4956 KB	Output is correct
4	Correct	2 ms	4952 KB	Output is correct
5	Correct	2 ms	4964 KB	Output is correct
6	Correct	2 ms	4956 KB	Output is correct
7	Correct	3 ms	4956 KB	Output is correct
8	Correct	3 ms	4956 KB	Output is correct
9	Correct	3 ms	4956 KB	Output is correct
10	Correct	4 ms	4956 KB	Output is correct
11	Correct	3 ms	4956 KB	Output is correct
12	Correct	3 ms	4956 KB	Output is correct
13	Correct	2 ms	4956 KB	Output is correct
14	Correct	3 ms	4956 KB	Output is correct
15	Correct	3 ms	5052 KB	Output is correct
16	Correct	3 ms	4956 KB	Output is correct
17	Correct	3 ms	4956 KB	Output is correct
18	Correct	3 ms	4956 KB	Output is correct
19	Correct	3 ms	4956 KB	Output is correct
20	Correct	3 ms	4956 KB	Output is correct
21	Correct	3 ms	4952 KB	Output is correct
22	Correct	3 ms	4956 KB	Output is correct
23	Correct	3 ms	4956 KB	Output is correct
24	Correct	3 ms	4956 KB	Output is correct
25	Correct	3 ms	4956 KB	Output is correct
26	Correct	2 ms	4956 KB	Output is correct
27	Correct	2 ms	4956 KB	Output is correct
28	Correct	3 ms	4956 KB	Output is correct
29	Correct	53 ms	5212 KB	Output is correct
30	Correct	86 ms	5212 KB	Output is correct
31	Correct	85 ms	5212 KB	Output is correct
32	Correct	71 ms	5212 KB	Output is correct
33	Correct	59 ms	5208 KB	Output is correct
34	Correct	89 ms	5212 KB	Output is correct
35	Correct	95 ms	5212 KB	Output is correct
36	Correct	40 ms	5208 KB	Output is correct
37	Correct	64 ms	5216 KB	Output is correct
38	Correct	58 ms	5208 KB	Output is correct
39	Correct	63 ms	5208 KB	Output is correct
40	Correct	68 ms	5212 KB	Output is correct
41	Correct	68 ms	5212 KB	Output is correct
42	Correct	66 ms	5208 KB	Output is correct
43	Correct	59 ms	5348 KB	Output is correct
44	Correct	72 ms	5208 KB	Output is correct
45	Correct	80 ms	5212 KB	Output is correct
46	Correct	79 ms	5464 KB	Output is correct
47	Correct	62 ms	5208 KB	Output is correct
48	Correct	68 ms	5208 KB	Output is correct
49	Correct	76 ms	5324 KB	Output is correct
50	Correct	87 ms	5212 KB	Output is correct
51	Correct	63 ms	5208 KB	Output is correct
52	Correct	76 ms	5208 KB	Output is correct
53	Correct	80 ms	5212 KB	Output is correct
54	Correct	93 ms	5212 KB	Output is correct

Subtask #3
25.0 / 25.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	4952 KB	Output is correct
2	Correct	2 ms	4956 KB	Output is correct
3	Correct	674 ms	12320 KB	Output is correct
4	Correct	1278 ms	13480 KB	Output is correct
5	Correct	315 ms	13396 KB	Output is correct
6	Correct	297 ms	12372 KB	Output is correct
7	Correct	297 ms	12372 KB	Output is correct
8	Correct	449 ms	12112 KB	Output is correct
9	Correct	470 ms	12372 KB	Output is correct
10	Correct	740 ms	13736 KB	Output is correct
11	Correct	706 ms	12320 KB	Output is correct
12	Correct	719 ms	13136 KB	Output is correct
13	Correct	580 ms	11384 KB	Output is correct
14	Correct	446 ms	11860 KB	Output is correct
15	Correct	641 ms	12784 KB	Output is correct
16	Correct	742 ms	13480 KB	Output is correct

Subtask #4
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	4952 KB	Output is correct
2	Correct	2 ms	4956 KB	Output is correct
3	Correct	2 ms	4956 KB	Output is correct
4	Correct	2 ms	4952 KB	Output is correct
5	Correct	2 ms	4964 KB	Output is correct
6	Correct	2 ms	4956 KB	Output is correct
7	Correct	3 ms	4956 KB	Output is correct
8	Correct	3 ms	4956 KB	Output is correct
9	Correct	3 ms	4956 KB	Output is correct
10	Correct	4 ms	4956 KB	Output is correct
11	Correct	3 ms	4956 KB	Output is correct
12	Correct	3 ms	4956 KB	Output is correct
13	Correct	2 ms	4956 KB	Output is correct
14	Correct	3 ms	4956 KB	Output is correct
15	Correct	3 ms	5052 KB	Output is correct
16	Correct	3 ms	4956 KB	Output is correct
17	Correct	3 ms	4956 KB	Output is correct
18	Correct	3 ms	4956 KB	Output is correct
19	Correct	3 ms	4956 KB	Output is correct
20	Correct	3 ms	4956 KB	Output is correct
21	Correct	3 ms	4952 KB	Output is correct
22	Correct	3 ms	4956 KB	Output is correct
23	Correct	3 ms	4956 KB	Output is correct
24	Correct	3 ms	4956 KB	Output is correct
25	Correct	3 ms	4956 KB	Output is correct
26	Correct	2 ms	4956 KB	Output is correct
27	Correct	2 ms	4956 KB	Output is correct
28	Correct	3 ms	4956 KB	Output is correct
29	Correct	674 ms	12320 KB	Output is correct
30	Correct	1278 ms	13480 KB	Output is correct
31	Correct	315 ms	13396 KB	Output is correct
32	Correct	297 ms	12372 KB	Output is correct
33	Correct	297 ms	12372 KB	Output is correct
34	Correct	449 ms	12112 KB	Output is correct
35	Correct	470 ms	12372 KB	Output is correct
36	Correct	740 ms	13736 KB	Output is correct
37	Correct	706 ms	12320 KB	Output is correct
38	Correct	719 ms	13136 KB	Output is correct
39	Correct	580 ms	11384 KB	Output is correct
40	Correct	446 ms	11860 KB	Output is correct
41	Correct	641 ms	12784 KB	Output is correct
42	Correct	742 ms	13480 KB	Output is correct
43	Correct	666 ms	12372 KB	Output is correct
44	Correct	1286 ms	13392 KB	Output is correct
45	Correct	1161 ms	13392 KB	Output is correct
46	Correct	274 ms	12372 KB	Output is correct
47	Correct	288 ms	12372 KB	Output is correct
48	Correct	527 ms	12372 KB	Output is correct
49	Correct	767 ms	13744 KB	Output is correct
50	Correct	763 ms	12116 KB	Output is correct
51	Correct	767 ms	12788 KB	Output is correct
52	Correct	702 ms	13396 KB	Output is correct
53	Correct	511 ms	11348 KB	Output is correct
54	Correct	501 ms	12112 KB	Output is correct
55	Correct	649 ms	12696 KB	Output is correct
56	Correct	772 ms	13392 KB	Output is correct

Subtask #5
0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	4952 KB	Output is correct
2	Correct	2 ms	4956 KB	Output is correct
3	Correct	2 ms	4956 KB	Output is correct
4	Correct	2 ms	4952 KB	Output is correct
5	Correct	2 ms	4964 KB	Output is correct
6	Correct	2 ms	4956 KB	Output is correct
7	Correct	3 ms	4956 KB	Output is correct
8	Correct	3 ms	4956 KB	Output is correct
9	Correct	3 ms	4956 KB	Output is correct
10	Correct	4 ms	4956 KB	Output is correct
11	Correct	3 ms	4956 KB	Output is correct
12	Correct	3 ms	4956 KB	Output is correct
13	Correct	2 ms	4956 KB	Output is correct
14	Correct	3 ms	4956 KB	Output is correct
15	Correct	3 ms	5052 KB	Output is correct
16	Correct	3 ms	4956 KB	Output is correct
17	Correct	3 ms	4956 KB	Output is correct
18	Correct	3 ms	4956 KB	Output is correct
19	Correct	3 ms	4956 KB	Output is correct
20	Correct	3 ms	4956 KB	Output is correct
21	Correct	3 ms	4952 KB	Output is correct
22	Correct	3 ms	4956 KB	Output is correct
23	Correct	3 ms	4956 KB	Output is correct
24	Correct	3 ms	4956 KB	Output is correct
25	Correct	3 ms	4956 KB	Output is correct
26	Correct	2 ms	4956 KB	Output is correct
27	Correct	2 ms	4956 KB	Output is correct
28	Correct	3 ms	4956 KB	Output is correct
29	Correct	53 ms	5212 KB	Output is correct
30	Correct	86 ms	5212 KB	Output is correct
31	Correct	85 ms	5212 KB	Output is correct
32	Correct	71 ms	5212 KB	Output is correct
33	Correct	59 ms	5208 KB	Output is correct
34	Correct	89 ms	5212 KB	Output is correct
35	Correct	95 ms	5212 KB	Output is correct
36	Correct	40 ms	5208 KB	Output is correct
37	Correct	64 ms	5216 KB	Output is correct
38	Correct	58 ms	5208 KB	Output is correct
39	Correct	63 ms	5208 KB	Output is correct
40	Correct	68 ms	5212 KB	Output is correct
41	Correct	68 ms	5212 KB	Output is correct
42	Correct	66 ms	5208 KB	Output is correct
43	Correct	59 ms	5348 KB	Output is correct
44	Correct	72 ms	5208 KB	Output is correct
45	Correct	80 ms	5212 KB	Output is correct
46	Correct	79 ms	5464 KB	Output is correct
47	Correct	62 ms	5208 KB	Output is correct
48	Correct	68 ms	5208 KB	Output is correct
49	Correct	76 ms	5324 KB	Output is correct
50	Correct	87 ms	5212 KB	Output is correct
51	Correct	63 ms	5208 KB	Output is correct
52	Correct	76 ms	5208 KB	Output is correct
53	Correct	80 ms	5212 KB	Output is correct
54	Correct	93 ms	5212 KB	Output is correct
55	Incorrect	459 ms	10068 KB	Output isn't correct
56	Halted	0 ms	0 KB	-

Subtask #6
0 / 29.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	4952 KB	Output is correct
2	Correct	2 ms	4956 KB	Output is correct
3	Correct	2 ms	4956 KB	Output is correct
4	Correct	2 ms	4952 KB	Output is correct
5	Correct	2 ms	4964 KB	Output is correct
6	Correct	2 ms	4956 KB	Output is correct
7	Correct	3 ms	4956 KB	Output is correct
8	Correct	3 ms	4956 KB	Output is correct
9	Correct	3 ms	4956 KB	Output is correct
10	Correct	4 ms	4956 KB	Output is correct
11	Correct	3 ms	4956 KB	Output is correct
12	Correct	3 ms	4956 KB	Output is correct
13	Correct	2 ms	4956 KB	Output is correct
14	Correct	3 ms	4956 KB	Output is correct
15	Correct	3 ms	5052 KB	Output is correct
16	Correct	3 ms	4956 KB	Output is correct
17	Correct	3 ms	4956 KB	Output is correct
18	Correct	3 ms	4956 KB	Output is correct
19	Correct	3 ms	4956 KB	Output is correct
20	Correct	3 ms	4956 KB	Output is correct
21	Correct	3 ms	4952 KB	Output is correct
22	Correct	3 ms	4956 KB	Output is correct
23	Correct	3 ms	4956 KB	Output is correct
24	Correct	3 ms	4956 KB	Output is correct
25	Correct	3 ms	4956 KB	Output is correct
26	Correct	2 ms	4956 KB	Output is correct
27	Correct	2 ms	4956 KB	Output is correct
28	Correct	3 ms	4956 KB	Output is correct
29	Correct	53 ms	5212 KB	Output is correct
30	Correct	86 ms	5212 KB	Output is correct
31	Correct	85 ms	5212 KB	Output is correct
32	Correct	71 ms	5212 KB	Output is correct
33	Correct	59 ms	5208 KB	Output is correct
34	Correct	89 ms	5212 KB	Output is correct
35	Correct	95 ms	5212 KB	Output is correct
36	Correct	40 ms	5208 KB	Output is correct
37	Correct	64 ms	5216 KB	Output is correct
38	Correct	58 ms	5208 KB	Output is correct
39	Correct	63 ms	5208 KB	Output is correct
40	Correct	68 ms	5212 KB	Output is correct
41	Correct	68 ms	5212 KB	Output is correct
42	Correct	66 ms	5208 KB	Output is correct
43	Correct	59 ms	5348 KB	Output is correct
44	Correct	72 ms	5208 KB	Output is correct
45	Correct	80 ms	5212 KB	Output is correct
46	Correct	79 ms	5464 KB	Output is correct
47	Correct	62 ms	5208 KB	Output is correct
48	Correct	68 ms	5208 KB	Output is correct
49	Correct	76 ms	5324 KB	Output is correct
50	Correct	87 ms	5212 KB	Output is correct
51	Correct	63 ms	5208 KB	Output is correct
52	Correct	76 ms	5208 KB	Output is correct
53	Correct	80 ms	5212 KB	Output is correct
54	Correct	93 ms	5212 KB	Output is correct
55	Correct	674 ms	12320 KB	Output is correct
56	Correct	1278 ms	13480 KB	Output is correct
57	Correct	315 ms	13396 KB	Output is correct
58	Correct	297 ms	12372 KB	Output is correct
59	Correct	297 ms	12372 KB	Output is correct
60	Correct	449 ms	12112 KB	Output is correct
61	Correct	470 ms	12372 KB	Output is correct
62	Correct	740 ms	13736 KB	Output is correct
63	Correct	706 ms	12320 KB	Output is correct
64	Correct	719 ms	13136 KB	Output is correct
65	Correct	580 ms	11384 KB	Output is correct
66	Correct	446 ms	11860 KB	Output is correct
67	Correct	641 ms	12784 KB	Output is correct
68	Correct	742 ms	13480 KB	Output is correct
69	Correct	666 ms	12372 KB	Output is correct
70	Correct	1286 ms	13392 KB	Output is correct
71	Correct	1161 ms	13392 KB	Output is correct
72	Correct	274 ms	12372 KB	Output is correct
73	Correct	288 ms	12372 KB	Output is correct
74	Correct	527 ms	12372 KB	Output is correct
75	Correct	767 ms	13744 KB	Output is correct
76	Correct	763 ms	12116 KB	Output is correct
77	Correct	767 ms	12788 KB	Output is correct
78	Correct	702 ms	13396 KB	Output is correct
79	Correct	511 ms	11348 KB	Output is correct
80	Correct	501 ms	12112 KB	Output is correct
81	Correct	649 ms	12696 KB	Output is correct
82	Correct	772 ms	13392 KB	Output is correct
83	Incorrect	459 ms	10068 KB	Output isn't correct
84	Halted	0 ms	0 KB	-

답안 #1093977

Compilation message

Subtask #1 6.0 / 6.0

Subtask #2 8.0 / 8.0

Subtask #3 25.0 / 25.0

Subtask #4 10.0 / 10.0

Subtask #5 0 / 22.0

Subtask #6 0 / 29.0

Subtask #1
6.0 / 6.0

Subtask #2
8.0 / 8.0

Subtask #3
25.0 / 25.0

Subtask #4
10.0 / 10.0

Subtask #5
0 / 22.0

Subtask #6
0 / 29.0