oj.uz

Submission #257653

# Submission time Handle Problem Language Result Execution time Memory
257653 2020-08-04T14:02:34 Z arnold518 Joker (BOI20_joker) C++14
14 / 100
 2000 ms 27644 KB 
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int MAXN = 4e5;
const int SQ = 1000;

struct Query
{
	int l, r, k;
	bool operator < (const Query &p) { return r>p.r; }
};

int N, M, Q;
pii E[MAXN+10];
Query A[MAXN+10];
vector<Query> B[MAXN+10];
int ans[MAXN+10];

struct UF
{
	//int par[MAXN+10], sz[MAXN+10], opp[MAXN+10];
	vector<int> par, sz, opp;
	bool state;
	vector<int> V;
	void init()
	{
		par.resize(2*N+10); sz.resize(2*N+10); opp.resize(2*N+10);
		int i, j;
		for(i=1; i<=N; i++) par[i]=i, sz[i]=1, opp[i]=N+i;
		for(i=1; i<=N; i++) par[i+N]=i+N, sz[i+N]=1, opp[i+N]=i;
		V.clear(); state=true;
	}
	int Find(int x)
	{
		if(x==par[x]) return x;
		return Find(par[x]);
	}
	void Union(int x, int y)
	{
		//printf("Union %d %d\n", x, y);

		x=Find(x); y=Find(y);
		int nx=opp[x], ny=opp[y];

		if(x==y || !state)
		{
			if(state) V.push_back(-1);
			else V.push_back(-2);
			state=false;
			return;
		}

		if(sz[x]<sz[ny]) swap(x, ny);
		if(sz[y]<sz[nx]) swap(y, nx);
		V.push_back(opp[x]); V.push_back(opp[y]); V.push_back(ny); V.push_back(nx);
		par[ny]=x; sz[x]+=sz[ny];
		par[nx]=y; sz[y]+=sz[nx];
		opp[x]=y; opp[y]=x;
	}
	void restore()
	{
		int ny, nx, x, y, oppx, oppy;
		//printf("RESTORE\n");
		if(V.empty()) while(1);
		if(V.back()<0)
		{
			if(V.back()==-1) state=true;
			V.pop_back();
		 	return;
		}
		nx=V.back(); V.pop_back();
		ny=V.back(); V.pop_back();
		oppy=V.back(); V.pop_back();
		oppx=V.back(); V.pop_back();
		x=par[ny]; y=par[nx];
		opp[x]=oppx; opp[y]=oppy;
		sz[x]-=sz[ny]; sz[y]-=sz[nx];
		par[ny]=ny; par[nx]=nx;
	}
}uf;


int main()
{
	int i, j, k;

	scanf("%d%d%d", &N, &M, &Q);
	for(i=1; i<=M; i++) scanf("%d%d", &E[i].first, &E[i].second);
	for(i=1; i<=Q; i++)
	{
		scanf("%d%d", &A[i].l, &A[i].r);
		A[i].k=i;
		B[A[i].l/SQ].push_back(A[i]);
	}

	uf.init();
	for(i=0, j=1; i<=M/SQ; i++)
	{
		int l=max(SQ*i, 1), r=min(SQ*i+SQ-1, M);
		sort(B[i].begin(), B[i].end());

		for(; j<l; j++) uf.Union(E[j].first, E[j].second);
		int p=M, q;
		for(auto it : B[i])
		{
			for(; p>it.r; p--) uf.Union(E[p].first, E[p].second);
			for(q=l; q<it.l; q++) uf.Union(E[q].first, E[q].second);
			ans[it.k]=uf.state;
			for(q=l; q<it.l; q++) uf.restore();
		}
		for(p++; p<=M; p++) uf.restore();
	}
	for(i=1; i<=Q; i++)
	{
		if(!ans[i]) printf("YES\n");
		else printf("NO\n");
	}
}

Compilation message

Joker.cpp: In member function 'void UF::init()':
Joker.cpp:32:10: warning: unused variable 'j' [-Wunused-variable]
   int i, j;
          ^
Joker.cpp: In function 'int main()':
Joker.cpp:103:23: warning: unused variable 'r' [-Wunused-variable]
   int l=max(SQ*i, 1), r=min(SQ*i+SQ-1, M);
                       ^
Joker.cpp:89:12: warning: unused variable 'k' [-Wunused-variable]
  int i, j, k;
            ^
Joker.cpp:91:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d", &N, &M, &Q);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~
Joker.cpp:92:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(i=1; i<=M; i++) scanf("%d%d", &E[i].first, &E[i].second);
                      ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Joker.cpp:95:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &A[i].l, &A[i].r);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 9728 KB Output is correct
2 Correct 6 ms 9728 KB Output is correct
3 Correct 6 ms 9728 KB Output is correct
4 Correct 9 ms 9728 KB Output is correct
5 Correct 8 ms 9728 KB Output is correct
6 Correct 8 ms 9728 KB Output is correct
7 Correct 8 ms 9728 KB Output is correct
8 Correct 7 ms 9728 KB Output is correct
9 Correct 9 ms 9728 KB Output is correct
10 Correct 9 ms 9728 KB Output is correct
11 Correct 8 ms 9808 KB Output is correct
12 Correct 10 ms 9728 KB Output is correct
13 Correct 7 ms 9728 KB Output is correct
14 Correct 10 ms 9728 KB Output is correct
15 Correct 11 ms 9728 KB Output is correct
16 Correct 11 ms 9728 KB Output is correct
17 Correct 8 ms 9728 KB Output is correct
18 Correct 11 ms 9728 KB Output is correct
19 Correct 11 ms 9728 KB Output is correct
20 Correct 11 ms 9728 KB Output is correct
21 Correct 10 ms 9728 KB Output is correct
22 Correct 9 ms 9728 KB Output is correct
23 Correct 9 ms 9728 KB Output is correct
24 Correct 10 ms 9728 KB Output is correct
25 Correct 10 ms 9728 KB Output is correct
26 Correct 8 ms 9728 KB Output is correct
27 Correct 8 ms 9728 KB Output is correct
28 Correct 7 ms 9728 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 9728 KB Output is correct
2 Correct 6 ms 9728 KB Output is correct
3 Correct 6 ms 9728 KB Output is correct
4 Correct 9 ms 9728 KB Output is correct
5 Correct 8 ms 9728 KB Output is correct
6 Correct 8 ms 9728 KB Output is correct
7 Correct 8 ms 9728 KB Output is correct
8 Correct 7 ms 9728 KB Output is correct
9 Correct 9 ms 9728 KB Output is correct
10 Correct 9 ms 9728 KB Output is correct
11 Correct 8 ms 9808 KB Output is correct
12 Correct 10 ms 9728 KB Output is correct
13 Correct 7 ms 9728 KB Output is correct
14 Correct 10 ms 9728 KB Output is correct
15 Correct 11 ms 9728 KB Output is correct
16 Correct 11 ms 9728 KB Output is correct
17 Correct 8 ms 9728 KB Output is correct
18 Correct 11 ms 9728 KB Output is correct
19 Correct 11 ms 9728 KB Output is correct
20 Correct 11 ms 9728 KB Output is correct
21 Correct 10 ms 9728 KB Output is correct
22 Correct 9 ms 9728 KB Output is correct
23 Correct 9 ms 9728 KB Output is correct
24 Correct 10 ms 9728 KB Output is correct
25 Correct 10 ms 9728 KB Output is correct
26 Correct 8 ms 9728 KB Output is correct
27 Correct 8 ms 9728 KB Output is correct
28 Correct 7 ms 9728 KB Output is correct
29 Correct 42 ms 9856 KB Output is correct
30 Correct 34 ms 9856 KB Output is correct
31 Correct 38 ms 9856 KB Output is correct
32 Correct 40 ms 9856 KB Output is correct
33 Correct 39 ms 9856 KB Output is correct
34 Correct 44 ms 9856 KB Output is correct
35 Correct 44 ms 9960 KB Output is correct
36 Correct 29 ms 9940 KB Output is correct
37 Correct 40 ms 9960 KB Output is correct
38 Correct 50 ms 9976 KB Output is correct
39 Correct 68 ms 9932 KB Output is correct
40 Correct 154 ms 9856 KB Output is correct
41 Correct 129 ms 9856 KB Output is correct
42 Correct 121 ms 9856 KB Output is correct
43 Correct 296 ms 9856 KB Output is correct
44 Correct 316 ms 9928 KB Output is correct
45 Correct 36 ms 9936 KB Output is correct
46 Correct 50 ms 9856 KB Output is correct
47 Correct 317 ms 9924 KB Output is correct
48 Correct 89 ms 9856 KB Output is correct
49 Correct 47 ms 9856 KB Output is correct
50 Correct 46 ms 9960 KB Output is correct
51 Correct 228 ms 9856 KB Output is correct
52 Correct 204 ms 10036 KB Output is correct
53 Correct 129 ms 9856 KB Output is correct
54 Correct 43 ms 9856 KB Output is correct

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 9728 KB Output is correct
2 Correct 6 ms 9728 KB Output is correct
3 Correct 154 ms 23780 KB Output is correct
4 Correct 175 ms 27644 KB Output is correct
5 Correct 162 ms 27216 KB Output is correct
6 Correct 154 ms 23776 KB Output is correct
7 Correct 165 ms 23776 KB Output is correct
8 Execution timed out 2080 ms 21508 KB Time limit exceeded
9 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 9728 KB Output is correct
2 Correct 6 ms 9728 KB Output is correct
3 Correct 6 ms 9728 KB Output is correct
4 Correct 9 ms 9728 KB Output is correct
5 Correct 8 ms 9728 KB Output is correct
6 Correct 8 ms 9728 KB Output is correct
7 Correct 8 ms 9728 KB Output is correct
8 Correct 7 ms 9728 KB Output is correct
9 Correct 9 ms 9728 KB Output is correct
10 Correct 9 ms 9728 KB Output is correct
11 Correct 8 ms 9808 KB Output is correct
12 Correct 10 ms 9728 KB Output is correct
13 Correct 7 ms 9728 KB Output is correct
14 Correct 10 ms 9728 KB Output is correct
15 Correct 11 ms 9728 KB Output is correct
16 Correct 11 ms 9728 KB Output is correct
17 Correct 8 ms 9728 KB Output is correct
18 Correct 11 ms 9728 KB Output is correct
19 Correct 11 ms 9728 KB Output is correct
20 Correct 11 ms 9728 KB Output is correct
21 Correct 10 ms 9728 KB Output is correct
22 Correct 9 ms 9728 KB Output is correct
23 Correct 9 ms 9728 KB Output is correct
24 Correct 10 ms 9728 KB Output is correct
25 Correct 10 ms 9728 KB Output is correct
26 Correct 8 ms 9728 KB Output is correct
27 Correct 8 ms 9728 KB Output is correct
28 Correct 7 ms 9728 KB Output is correct
29 Correct 154 ms 23780 KB Output is correct
30 Correct 175 ms 27644 KB Output is correct
31 Correct 162 ms 27216 KB Output is correct
32 Correct 154 ms 23776 KB Output is correct
33 Correct 165 ms 23776 KB Output is correct
34 Execution timed out 2080 ms 21508 KB Time limit exceeded
35 Halted 0 ms 0 KB -

Subtask #5
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 9728 KB Output is correct
2 Correct 6 ms 9728 KB Output is correct
3 Correct 6 ms 9728 KB Output is correct
4 Correct 9 ms 9728 KB Output is correct
5 Correct 8 ms 9728 KB Output is correct
6 Correct 8 ms 9728 KB Output is correct
7 Correct 8 ms 9728 KB Output is correct
8 Correct 7 ms 9728 KB Output is correct
9 Correct 9 ms 9728 KB Output is correct
10 Correct 9 ms 9728 KB Output is correct
11 Correct 8 ms 9808 KB Output is correct
12 Correct 10 ms 9728 KB Output is correct
13 Correct 7 ms 9728 KB Output is correct
14 Correct 10 ms 9728 KB Output is correct
15 Correct 11 ms 9728 KB Output is correct
16 Correct 11 ms 9728 KB Output is correct
17 Correct 8 ms 9728 KB Output is correct
18 Correct 11 ms 9728 KB Output is correct
19 Correct 11 ms 9728 KB Output is correct
20 Correct 11 ms 9728 KB Output is correct
21 Correct 10 ms 9728 KB Output is correct
22 Correct 9 ms 9728 KB Output is correct
23 Correct 9 ms 9728 KB Output is correct
24 Correct 10 ms 9728 KB Output is correct
25 Correct 10 ms 9728 KB Output is correct
26 Correct 8 ms 9728 KB Output is correct
27 Correct 8 ms 9728 KB Output is correct
28 Correct 7 ms 9728 KB Output is correct
29 Correct 42 ms 9856 KB Output is correct
30 Correct 34 ms 9856 KB Output is correct
31 Correct 38 ms 9856 KB Output is correct
32 Correct 40 ms 9856 KB Output is correct
33 Correct 39 ms 9856 KB Output is correct
34 Correct 44 ms 9856 KB Output is correct
35 Correct 44 ms 9960 KB Output is correct
36 Correct 29 ms 9940 KB Output is correct
37 Correct 40 ms 9960 KB Output is correct
38 Correct 50 ms 9976 KB Output is correct
39 Correct 68 ms 9932 KB Output is correct
40 Correct 154 ms 9856 KB Output is correct
41 Correct 129 ms 9856 KB Output is correct
42 Correct 121 ms 9856 KB Output is correct
43 Correct 296 ms 9856 KB Output is correct
44 Correct 316 ms 9928 KB Output is correct
45 Correct 36 ms 9936 KB Output is correct
46 Correct 50 ms 9856 KB Output is correct
47 Correct 317 ms 9924 KB Output is correct
48 Correct 89 ms 9856 KB Output is correct
49 Correct 47 ms 9856 KB Output is correct
50 Correct 46 ms 9960 KB Output is correct
51 Correct 228 ms 9856 KB Output is correct
52 Correct 204 ms 10036 KB Output is correct
53 Correct 129 ms 9856 KB Output is correct
54 Correct 43 ms 9856 KB Output is correct
55 Correct 606 ms 15852 KB Output is correct
56 Execution timed out 2082 ms 21096 KB Time limit exceeded
57 Halted 0 ms 0 KB -

Subtask #6
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 9728 KB Output is correct
2 Correct 6 ms 9728 KB Output is correct
3 Correct 6 ms 9728 KB Output is correct
4 Correct 9 ms 9728 KB Output is correct
5 Correct 8 ms 9728 KB Output is correct
6 Correct 8 ms 9728 KB Output is correct
7 Correct 8 ms 9728 KB Output is correct
8 Correct 7 ms 9728 KB Output is correct
9 Correct 9 ms 9728 KB Output is correct
10 Correct 9 ms 9728 KB Output is correct
11 Correct 8 ms 9808 KB Output is correct
12 Correct 10 ms 9728 KB Output is correct
13 Correct 7 ms 9728 KB Output is correct
14 Correct 10 ms 9728 KB Output is correct
15 Correct 11 ms 9728 KB Output is correct
16 Correct 11 ms 9728 KB Output is correct
17 Correct 8 ms 9728 KB Output is correct
18 Correct 11 ms 9728 KB Output is correct
19 Correct 11 ms 9728 KB Output is correct
20 Correct 11 ms 9728 KB Output is correct
21 Correct 10 ms 9728 KB Output is correct
22 Correct 9 ms 9728 KB Output is correct
23 Correct 9 ms 9728 KB Output is correct
24 Correct 10 ms 9728 KB Output is correct
25 Correct 10 ms 9728 KB Output is correct
26 Correct 8 ms 9728 KB Output is correct
27 Correct 8 ms 9728 KB Output is correct
28 Correct 7 ms 9728 KB Output is correct
29 Correct 42 ms 9856 KB Output is correct
30 Correct 34 ms 9856 KB Output is correct
31 Correct 38 ms 9856 KB Output is correct
32 Correct 40 ms 9856 KB Output is correct
33 Correct 39 ms 9856 KB Output is correct
34 Correct 44 ms 9856 KB Output is correct
35 Correct 44 ms 9960 KB Output is correct
36 Correct 29 ms 9940 KB Output is correct
37 Correct 40 ms 9960 KB Output is correct
38 Correct 50 ms 9976 KB Output is correct
39 Correct 68 ms 9932 KB Output is correct
40 Correct 154 ms 9856 KB Output is correct
41 Correct 129 ms 9856 KB Output is correct
42 Correct 121 ms 9856 KB Output is correct
43 Correct 296 ms 9856 KB Output is correct
44 Correct 316 ms 9928 KB Output is correct
45 Correct 36 ms 9936 KB Output is correct
46 Correct 50 ms 9856 KB Output is correct
47 Correct 317 ms 9924 KB Output is correct
48 Correct 89 ms 9856 KB Output is correct
49 Correct 47 ms 9856 KB Output is correct
50 Correct 46 ms 9960 KB Output is correct
51 Correct 228 ms 9856 KB Output is correct
52 Correct 204 ms 10036 KB Output is correct
53 Correct 129 ms 9856 KB Output is correct
54 Correct 43 ms 9856 KB Output is correct
55 Correct 154 ms 23780 KB Output is correct
56 Correct 175 ms 27644 KB Output is correct
57 Correct 162 ms 27216 KB Output is correct
58 Correct 154 ms 23776 KB Output is correct
59 Correct 165 ms 23776 KB Output is correct
60 Execution timed out 2080 ms 21508 KB Time limit exceeded
61 Halted 0 ms 0 KB -