oj.uz

Submission #1093977

# Submission time Handle Problem Language Result Execution time Memory
1093977 2024-09-28T08:00:40 Z simona1230 Joker (BOI20_joker) C++17
49 / 100
 1286 ms 13744 KB 
#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

# Verdict Execution time Memory 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

# Verdict Execution time Memory 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

# Verdict Execution time Memory 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

# Verdict Execution time Memory 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

# Verdict Execution time Memory 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

# Verdict Execution time Memory 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 -