oj.uz

Submission #1093653

# Submission time Handle Problem Language Result Execution time Memory
1093653 2024-09-27T07:42:00 Z duyhoanho Joker (BOI20_joker) C++14
14 / 100
 2000 ms 13168 KB 
#include<bits/stdc++.h>
#define int long long
#define forinc(i,a,b) for(int i=a;i<=b;i++)
#define fi first
#define se second
#define pii pair<int,int>
#define pb push_back
using namespace std;
const int N = 2e5+10;
int n,m,q,fre[N],lz[N],p[N],sz[N];

pii d[N];
vector<int> ad[N];
//sub1
bool qu1(int l,int r)
{
    bool ok = 0;
    forinc(i,1,n) ad[i].clear();
    forinc(i,1,m)
    {
        if(l<=i && i<=r) continue;
        int x,y;
        tie(x,y) = d[i];
        ad[x].pb(y);
        ad[y].pb(x);
    }

    for(int i=1; i<=n; i++) fre[i] = -1;
    for(int i=1; i<=n; i++)
    {
        if(fre[i] == -1)
        {
            queue<int> q;
            q.push(i);
            fre[i] = 0;
            while(q.size())
            {
                int u = q.front();
                q.pop();
                for(int v:ad[u])
                {
                    if(fre[v] == fre[u]) return true;
                    if(fre[v] != -1) continue;
                    fre[v] = 1 - fre[u];
                    q.push(v);
                }

            }
        }
    }
    return false;
}
//sub2
int pa(int v,int &c)
{
  c ^= lz[v];
  if(p[v] == v) return v;
  return pa(p[v] , c);
}
void join(int a,int b)
{
  int ca = 0;
  int cb = 0;
  a = pa(a,ca);
  b = pa(b,cb);
  if(a != b)
  {
    if(sz[a] < sz[b]) swap(a,b);
    sz[a] += sz[b];
    p[b] = a;
    if(ca == cb) lz[b] = 1;
  }
}
bool check(int a,int b)
{
  int ca = 0;
  int cb = 0;
  a = pa(a,ca);
  b = pa(b,cb);
  if(a == b && ca == cb) return true;
  return false;
}
bool qu2(int l,int r)
{
  forinc(i,1,n)
  {
    sz[i] = 1;
    p[i] = i;
    lz[i] = 0;
  }
  for(int i=1;i<=m;i++)
  {
    if(l<=i && i<=r) continue;
    if(check(d[i].fi , d[i].se)) return true;
    join(d[i].fi , d[i].se);
  }
  return false;
}
int32_t main()
{
    if(fopen("task.inp","r"))
    {
        freopen("task.inp","r",stdin);
        freopen("task.out","w",stdout);
    }
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cin>>n>>m>>q;
    forinc(i,1,m)
    {
        int x,y;
        cin>>x>>y;
        d[i] = {x,y};
    }
    if(n<=2000 && m <= 2000 && q <= 2000)
    {
        while(q--)
        {
            int l,r;
            cin>>l>>r;
            cout<< (qu1(l,r) ? "YES\n" : "NO\n");
        }
        return 0;

    }
    while(q--)
    {
      int l,r;
      cin>>l>>r;
      cout<< (qu2(l,r) ? "YES\n" : "NO\n");
    }

}

Compilation message

Joker.cpp: In function 'bool qu1(long long int, long long int)':
Joker.cpp:17:10: warning: unused variable 'ok' [-Wunused-variable]
   17 |     bool ok = 0;
      |          ^~
Joker.cpp: In function 'int32_t main()':
Joker.cpp:103:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  103 |         freopen("task.inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
Joker.cpp:104:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  104 |         freopen("task.out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4956 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 4956 KB Output is correct
5 Correct 2 ms 4956 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 2 ms 4956 KB Output is correct
10 Correct 2 ms 4956 KB Output is correct
11 Correct 3 ms 4956 KB Output is correct
12 Correct 3 ms 5164 KB Output is correct
13 Correct 3 ms 5212 KB Output is correct
14 Correct 3 ms 5164 KB Output is correct
15 Correct 3 ms 4952 KB Output is correct
16 Correct 3 ms 4956 KB Output is correct
17 Correct 2 ms 4956 KB Output is correct
18 Correct 3 ms 4956 KB Output is correct
19 Correct 2 ms 4956 KB Output is correct
20 Correct 2 ms 4956 KB Output is correct
21 Correct 2 ms 4956 KB Output is correct
22 Correct 3 ms 4956 KB Output is correct
23 Correct 2 ms 4956 KB Output is correct
24 Correct 2 ms 4956 KB Output is correct
25 Correct 2 ms 4956 KB Output is correct
26 Correct 2 ms 5164 KB Output is correct
27 Correct 2 ms 4956 KB Output is correct
28 Correct 2 ms 4956 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4956 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 4956 KB Output is correct
5 Correct 2 ms 4956 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 2 ms 4956 KB Output is correct
10 Correct 2 ms 4956 KB Output is correct
11 Correct 3 ms 4956 KB Output is correct
12 Correct 3 ms 5164 KB Output is correct
13 Correct 3 ms 5212 KB Output is correct
14 Correct 3 ms 5164 KB Output is correct
15 Correct 3 ms 4952 KB Output is correct
16 Correct 3 ms 4956 KB Output is correct
17 Correct 2 ms 4956 KB Output is correct
18 Correct 3 ms 4956 KB Output is correct
19 Correct 2 ms 4956 KB Output is correct
20 Correct 2 ms 4956 KB Output is correct
21 Correct 2 ms 4956 KB Output is correct
22 Correct 3 ms 4956 KB Output is correct
23 Correct 2 ms 4956 KB Output is correct
24 Correct 2 ms 4956 KB Output is correct
25 Correct 2 ms 4956 KB Output is correct
26 Correct 2 ms 5164 KB Output is correct
27 Correct 2 ms 4956 KB Output is correct
28 Correct 2 ms 4956 KB Output is correct
29 Correct 97 ms 5212 KB Output is correct
30 Correct 69 ms 5212 KB Output is correct
31 Correct 49 ms 5212 KB Output is correct
32 Correct 28 ms 5212 KB Output is correct
33 Correct 18 ms 5208 KB Output is correct
34 Correct 53 ms 5212 KB Output is correct
35 Correct 71 ms 5304 KB Output is correct
36 Correct 36 ms 5212 KB Output is correct
37 Correct 92 ms 5304 KB Output is correct
38 Correct 75 ms 5304 KB Output is correct
39 Correct 71 ms 5464 KB Output is correct
40 Correct 38 ms 5212 KB Output is correct
41 Correct 37 ms 5208 KB Output is correct
42 Correct 37 ms 5172 KB Output is correct
43 Correct 19 ms 5208 KB Output is correct
44 Correct 21 ms 5212 KB Output is correct
45 Correct 25 ms 5212 KB Output is correct
46 Correct 31 ms 5208 KB Output is correct
47 Correct 35 ms 5212 KB Output is correct
48 Correct 37 ms 5208 KB Output is correct
49 Correct 53 ms 5212 KB Output is correct
50 Correct 69 ms 5212 KB Output is correct
51 Correct 27 ms 5208 KB Output is correct
52 Correct 34 ms 5212 KB Output is correct
53 Correct 46 ms 5324 KB Output is correct
54 Correct 66 ms 5212 KB Output is correct

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4956 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Execution timed out 2040 ms 13168 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4956 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 4956 KB Output is correct
5 Correct 2 ms 4956 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 2 ms 4956 KB Output is correct
10 Correct 2 ms 4956 KB Output is correct
11 Correct 3 ms 4956 KB Output is correct
12 Correct 3 ms 5164 KB Output is correct
13 Correct 3 ms 5212 KB Output is correct
14 Correct 3 ms 5164 KB Output is correct
15 Correct 3 ms 4952 KB Output is correct
16 Correct 3 ms 4956 KB Output is correct
17 Correct 2 ms 4956 KB Output is correct
18 Correct 3 ms 4956 KB Output is correct
19 Correct 2 ms 4956 KB Output is correct
20 Correct 2 ms 4956 KB Output is correct
21 Correct 2 ms 4956 KB Output is correct
22 Correct 3 ms 4956 KB Output is correct
23 Correct 2 ms 4956 KB Output is correct
24 Correct 2 ms 4956 KB Output is correct
25 Correct 2 ms 4956 KB Output is correct
26 Correct 2 ms 5164 KB Output is correct
27 Correct 2 ms 4956 KB Output is correct
28 Correct 2 ms 4956 KB Output is correct
29 Execution timed out 2040 ms 13168 KB Time limit exceeded
30 Halted 0 ms 0 KB -

Subtask #5
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4956 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 4956 KB Output is correct
5 Correct 2 ms 4956 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 2 ms 4956 KB Output is correct
10 Correct 2 ms 4956 KB Output is correct
11 Correct 3 ms 4956 KB Output is correct
12 Correct 3 ms 5164 KB Output is correct
13 Correct 3 ms 5212 KB Output is correct
14 Correct 3 ms 5164 KB Output is correct
15 Correct 3 ms 4952 KB Output is correct
16 Correct 3 ms 4956 KB Output is correct
17 Correct 2 ms 4956 KB Output is correct
18 Correct 3 ms 4956 KB Output is correct
19 Correct 2 ms 4956 KB Output is correct
20 Correct 2 ms 4956 KB Output is correct
21 Correct 2 ms 4956 KB Output is correct
22 Correct 3 ms 4956 KB Output is correct
23 Correct 2 ms 4956 KB Output is correct
24 Correct 2 ms 4956 KB Output is correct
25 Correct 2 ms 4956 KB Output is correct
26 Correct 2 ms 5164 KB Output is correct
27 Correct 2 ms 4956 KB Output is correct
28 Correct 2 ms 4956 KB Output is correct
29 Correct 97 ms 5212 KB Output is correct
30 Correct 69 ms 5212 KB Output is correct
31 Correct 49 ms 5212 KB Output is correct
32 Correct 28 ms 5212 KB Output is correct
33 Correct 18 ms 5208 KB Output is correct
34 Correct 53 ms 5212 KB Output is correct
35 Correct 71 ms 5304 KB Output is correct
36 Correct 36 ms 5212 KB Output is correct
37 Correct 92 ms 5304 KB Output is correct
38 Correct 75 ms 5304 KB Output is correct
39 Correct 71 ms 5464 KB Output is correct
40 Correct 38 ms 5212 KB Output is correct
41 Correct 37 ms 5208 KB Output is correct
42 Correct 37 ms 5172 KB Output is correct
43 Correct 19 ms 5208 KB Output is correct
44 Correct 21 ms 5212 KB Output is correct
45 Correct 25 ms 5212 KB Output is correct
46 Correct 31 ms 5208 KB Output is correct
47 Correct 35 ms 5212 KB Output is correct
48 Correct 37 ms 5208 KB Output is correct
49 Correct 53 ms 5212 KB Output is correct
50 Correct 69 ms 5212 KB Output is correct
51 Correct 27 ms 5208 KB Output is correct
52 Correct 34 ms 5212 KB Output is correct
53 Correct 46 ms 5324 KB Output is correct
54 Correct 66 ms 5212 KB Output is correct
55 Execution timed out 2057 ms 12884 KB Time limit exceeded
56 Halted 0 ms 0 KB -

Subtask #6
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4956 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 4956 KB Output is correct
5 Correct 2 ms 4956 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 2 ms 4956 KB Output is correct
10 Correct 2 ms 4956 KB Output is correct
11 Correct 3 ms 4956 KB Output is correct
12 Correct 3 ms 5164 KB Output is correct
13 Correct 3 ms 5212 KB Output is correct
14 Correct 3 ms 5164 KB Output is correct
15 Correct 3 ms 4952 KB Output is correct
16 Correct 3 ms 4956 KB Output is correct
17 Correct 2 ms 4956 KB Output is correct
18 Correct 3 ms 4956 KB Output is correct
19 Correct 2 ms 4956 KB Output is correct
20 Correct 2 ms 4956 KB Output is correct
21 Correct 2 ms 4956 KB Output is correct
22 Correct 3 ms 4956 KB Output is correct
23 Correct 2 ms 4956 KB Output is correct
24 Correct 2 ms 4956 KB Output is correct
25 Correct 2 ms 4956 KB Output is correct
26 Correct 2 ms 5164 KB Output is correct
27 Correct 2 ms 4956 KB Output is correct
28 Correct 2 ms 4956 KB Output is correct
29 Correct 97 ms 5212 KB Output is correct
30 Correct 69 ms 5212 KB Output is correct
31 Correct 49 ms 5212 KB Output is correct
32 Correct 28 ms 5212 KB Output is correct
33 Correct 18 ms 5208 KB Output is correct
34 Correct 53 ms 5212 KB Output is correct
35 Correct 71 ms 5304 KB Output is correct
36 Correct 36 ms 5212 KB Output is correct
37 Correct 92 ms 5304 KB Output is correct
38 Correct 75 ms 5304 KB Output is correct
39 Correct 71 ms 5464 KB Output is correct
40 Correct 38 ms 5212 KB Output is correct
41 Correct 37 ms 5208 KB Output is correct
42 Correct 37 ms 5172 KB Output is correct
43 Correct 19 ms 5208 KB Output is correct
44 Correct 21 ms 5212 KB Output is correct
45 Correct 25 ms 5212 KB Output is correct
46 Correct 31 ms 5208 KB Output is correct
47 Correct 35 ms 5212 KB Output is correct
48 Correct 37 ms 5208 KB Output is correct
49 Correct 53 ms 5212 KB Output is correct
50 Correct 69 ms 5212 KB Output is correct
51 Correct 27 ms 5208 KB Output is correct
52 Correct 34 ms 5212 KB Output is correct
53 Correct 46 ms 5324 KB Output is correct
54 Correct 66 ms 5212 KB Output is correct
55 Execution timed out 2040 ms 13168 KB Time limit exceeded
56 Halted 0 ms 0 KB -