oj.uz

Submission #257656

# Submission time Handle Problem Language Result Execution time Memory
257656 2020-08-04T14:03:44 Z arnold518 Joker (BOI20_joker) C++14
14 / 100
 2000 ms 27616 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 = 5000;

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 6 ms 9728 KB Output is correct
2 Correct 7 ms 9728 KB Output is correct
3 Correct 6 ms 9728 KB Output is correct
4 Correct 6 ms 9728 KB Output is correct
5 Correct 6 ms 9728 KB Output is correct
6 Correct 6 ms 9728 KB Output is correct
7 Correct 7 ms 9728 KB Output is correct
8 Correct 7 ms 9728 KB Output is correct
9 Correct 7 ms 9728 KB Output is correct
10 Correct 8 ms 9728 KB Output is correct
11 Correct 6 ms 9728 KB Output is correct
12 Correct 10 ms 9728 KB Output is correct
13 Correct 6 ms 9728 KB Output is correct
14 Correct 8 ms 9728 KB Output is correct
15 Correct 7 ms 9728 KB Output is correct
16 Correct 7 ms 9728 KB Output is correct
17 Correct 7 ms 9728 KB Output is correct
18 Correct 8 ms 9728 KB Output is correct
19 Correct 8 ms 9728 KB Output is correct
20 Correct 7 ms 9728 KB Output is correct
21 Correct 7 ms 9728 KB Output is correct
22 Correct 7 ms 9728 KB Output is correct
23 Correct 8 ms 9728 KB Output is correct
24 Correct 8 ms 9728 KB Output is correct
25 Correct 7 ms 9728 KB Output is correct
26 Correct 7 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 6 ms 9728 KB Output is correct
2 Correct 7 ms 9728 KB Output is correct
3 Correct 6 ms 9728 KB Output is correct
4 Correct 6 ms 9728 KB Output is correct
5 Correct 6 ms 9728 KB Output is correct
6 Correct 6 ms 9728 KB Output is correct
7 Correct 7 ms 9728 KB Output is correct
8 Correct 7 ms 9728 KB Output is correct
9 Correct 7 ms 9728 KB Output is correct
10 Correct 8 ms 9728 KB Output is correct
11 Correct 6 ms 9728 KB Output is correct
12 Correct 10 ms 9728 KB Output is correct
13 Correct 6 ms 9728 KB Output is correct
14 Correct 8 ms 9728 KB Output is correct
15 Correct 7 ms 9728 KB Output is correct
16 Correct 7 ms 9728 KB Output is correct
17 Correct 7 ms 9728 KB Output is correct
18 Correct 8 ms 9728 KB Output is correct
19 Correct 8 ms 9728 KB Output is correct
20 Correct 7 ms 9728 KB Output is correct
21 Correct 7 ms 9728 KB Output is correct
22 Correct 7 ms 9728 KB Output is correct
23 Correct 8 ms 9728 KB Output is correct
24 Correct 8 ms 9728 KB Output is correct
25 Correct 7 ms 9728 KB Output is correct
26 Correct 7 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 45 ms 9856 KB Output is correct
30 Correct 66 ms 9856 KB Output is correct
31 Correct 74 ms 9856 KB Output is correct
32 Correct 61 ms 9856 KB Output is correct
33 Correct 56 ms 9856 KB Output is correct
34 Correct 58 ms 9856 KB Output is correct
35 Correct 76 ms 9856 KB Output is correct
36 Correct 63 ms 9928 KB Output is correct
37 Correct 80 ms 9856 KB Output is correct
38 Correct 116 ms 9856 KB Output is correct
39 Correct 97 ms 9856 KB Output is correct
40 Correct 148 ms 9856 KB Output is correct
41 Correct 140 ms 9856 KB Output is correct
42 Correct 108 ms 9856 KB Output is correct
43 Correct 267 ms 9976 KB Output is correct
44 Correct 250 ms 9976 KB Output is correct
45 Correct 74 ms 9856 KB Output is correct
46 Correct 86 ms 9856 KB Output is correct
47 Correct 307 ms 9856 KB Output is correct
48 Correct 161 ms 9856 KB Output is correct
49 Correct 98 ms 9856 KB Output is correct
50 Correct 87 ms 9856 KB Output is correct
51 Correct 327 ms 9976 KB Output is correct
52 Correct 256 ms 9856 KB Output is correct
53 Correct 157 ms 9856 KB Output is correct
54 Correct 82 ms 9856 KB Output is correct

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9728 KB Output is correct
2 Correct 7 ms 9728 KB Output is correct
3 Correct 141 ms 23776 KB Output is correct
4 Correct 161 ms 27616 KB Output is correct
5 Correct 156 ms 27104 KB Output is correct
6 Correct 156 ms 23776 KB Output is correct
7 Correct 151 ms 23776 KB Output is correct
8 Execution timed out 2089 ms 21604 KB Time limit exceeded
9 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9728 KB Output is correct
2 Correct 7 ms 9728 KB Output is correct
3 Correct 6 ms 9728 KB Output is correct
4 Correct 6 ms 9728 KB Output is correct
5 Correct 6 ms 9728 KB Output is correct
6 Correct 6 ms 9728 KB Output is correct
7 Correct 7 ms 9728 KB Output is correct
8 Correct 7 ms 9728 KB Output is correct
9 Correct 7 ms 9728 KB Output is correct
10 Correct 8 ms 9728 KB Output is correct
11 Correct 6 ms 9728 KB Output is correct
12 Correct 10 ms 9728 KB Output is correct
13 Correct 6 ms 9728 KB Output is correct
14 Correct 8 ms 9728 KB Output is correct
15 Correct 7 ms 9728 KB Output is correct
16 Correct 7 ms 9728 KB Output is correct
17 Correct 7 ms 9728 KB Output is correct
18 Correct 8 ms 9728 KB Output is correct
19 Correct 8 ms 9728 KB Output is correct
20 Correct 7 ms 9728 KB Output is correct
21 Correct 7 ms 9728 KB Output is correct
22 Correct 7 ms 9728 KB Output is correct
23 Correct 8 ms 9728 KB Output is correct
24 Correct 8 ms 9728 KB Output is correct
25 Correct 7 ms 9728 KB Output is correct
26 Correct 7 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 141 ms 23776 KB Output is correct
30 Correct 161 ms 27616 KB Output is correct
31 Correct 156 ms 27104 KB Output is correct
32 Correct 156 ms 23776 KB Output is correct
33 Correct 151 ms 23776 KB Output is correct
34 Execution timed out 2089 ms 21604 KB Time limit exceeded
35 Halted 0 ms 0 KB -

Subtask #5
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9728 KB Output is correct
2 Correct 7 ms 9728 KB Output is correct
3 Correct 6 ms 9728 KB Output is correct
4 Correct 6 ms 9728 KB Output is correct
5 Correct 6 ms 9728 KB Output is correct
6 Correct 6 ms 9728 KB Output is correct
7 Correct 7 ms 9728 KB Output is correct
8 Correct 7 ms 9728 KB Output is correct
9 Correct 7 ms 9728 KB Output is correct
10 Correct 8 ms 9728 KB Output is correct
11 Correct 6 ms 9728 KB Output is correct
12 Correct 10 ms 9728 KB Output is correct
13 Correct 6 ms 9728 KB Output is correct
14 Correct 8 ms 9728 KB Output is correct
15 Correct 7 ms 9728 KB Output is correct
16 Correct 7 ms 9728 KB Output is correct
17 Correct 7 ms 9728 KB Output is correct
18 Correct 8 ms 9728 KB Output is correct
19 Correct 8 ms 9728 KB Output is correct
20 Correct 7 ms 9728 KB Output is correct
21 Correct 7 ms 9728 KB Output is correct
22 Correct 7 ms 9728 KB Output is correct
23 Correct 8 ms 9728 KB Output is correct
24 Correct 8 ms 9728 KB Output is correct
25 Correct 7 ms 9728 KB Output is correct
26 Correct 7 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 45 ms 9856 KB Output is correct
30 Correct 66 ms 9856 KB Output is correct
31 Correct 74 ms 9856 KB Output is correct
32 Correct 61 ms 9856 KB Output is correct
33 Correct 56 ms 9856 KB Output is correct
34 Correct 58 ms 9856 KB Output is correct
35 Correct 76 ms 9856 KB Output is correct
36 Correct 63 ms 9928 KB Output is correct
37 Correct 80 ms 9856 KB Output is correct
38 Correct 116 ms 9856 KB Output is correct
39 Correct 97 ms 9856 KB Output is correct
40 Correct 148 ms 9856 KB Output is correct
41 Correct 140 ms 9856 KB Output is correct
42 Correct 108 ms 9856 KB Output is correct
43 Correct 267 ms 9976 KB Output is correct
44 Correct 250 ms 9976 KB Output is correct
45 Correct 74 ms 9856 KB Output is correct
46 Correct 86 ms 9856 KB Output is correct
47 Correct 307 ms 9856 KB Output is correct
48 Correct 161 ms 9856 KB Output is correct
49 Correct 98 ms 9856 KB Output is correct
50 Correct 87 ms 9856 KB Output is correct
51 Correct 327 ms 9976 KB Output is correct
52 Correct 256 ms 9856 KB Output is correct
53 Correct 157 ms 9856 KB Output is correct
54 Correct 82 ms 9856 KB Output is correct
55 Correct 333 ms 15916 KB Output is correct
56 Correct 990 ms 20332 KB Output is correct
57 Execution timed out 2088 ms 22556 KB Time limit exceeded
58 Halted 0 ms 0 KB -

Subtask #6
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9728 KB Output is correct
2 Correct 7 ms 9728 KB Output is correct
3 Correct 6 ms 9728 KB Output is correct
4 Correct 6 ms 9728 KB Output is correct
5 Correct 6 ms 9728 KB Output is correct
6 Correct 6 ms 9728 KB Output is correct
7 Correct 7 ms 9728 KB Output is correct
8 Correct 7 ms 9728 KB Output is correct
9 Correct 7 ms 9728 KB Output is correct
10 Correct 8 ms 9728 KB Output is correct
11 Correct 6 ms 9728 KB Output is correct
12 Correct 10 ms 9728 KB Output is correct
13 Correct 6 ms 9728 KB Output is correct
14 Correct 8 ms 9728 KB Output is correct
15 Correct 7 ms 9728 KB Output is correct
16 Correct 7 ms 9728 KB Output is correct
17 Correct 7 ms 9728 KB Output is correct
18 Correct 8 ms 9728 KB Output is correct
19 Correct 8 ms 9728 KB Output is correct
20 Correct 7 ms 9728 KB Output is correct
21 Correct 7 ms 9728 KB Output is correct
22 Correct 7 ms 9728 KB Output is correct
23 Correct 8 ms 9728 KB Output is correct
24 Correct 8 ms 9728 KB Output is correct
25 Correct 7 ms 9728 KB Output is correct
26 Correct 7 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 45 ms 9856 KB Output is correct
30 Correct 66 ms 9856 KB Output is correct
31 Correct 74 ms 9856 KB Output is correct
32 Correct 61 ms 9856 KB Output is correct
33 Correct 56 ms 9856 KB Output is correct
34 Correct 58 ms 9856 KB Output is correct
35 Correct 76 ms 9856 KB Output is correct
36 Correct 63 ms 9928 KB Output is correct
37 Correct 80 ms 9856 KB Output is correct
38 Correct 116 ms 9856 KB Output is correct
39 Correct 97 ms 9856 KB Output is correct
40 Correct 148 ms 9856 KB Output is correct
41 Correct 140 ms 9856 KB Output is correct
42 Correct 108 ms 9856 KB Output is correct
43 Correct 267 ms 9976 KB Output is correct
44 Correct 250 ms 9976 KB Output is correct
45 Correct 74 ms 9856 KB Output is correct
46 Correct 86 ms 9856 KB Output is correct
47 Correct 307 ms 9856 KB Output is correct
48 Correct 161 ms 9856 KB Output is correct
49 Correct 98 ms 9856 KB Output is correct
50 Correct 87 ms 9856 KB Output is correct
51 Correct 327 ms 9976 KB Output is correct
52 Correct 256 ms 9856 KB Output is correct
53 Correct 157 ms 9856 KB Output is correct
54 Correct 82 ms 9856 KB Output is correct
55 Correct 141 ms 23776 KB Output is correct
56 Correct 161 ms 27616 KB Output is correct
57 Correct 156 ms 27104 KB Output is correct
58 Correct 156 ms 23776 KB Output is correct
59 Correct 151 ms 23776 KB Output is correct
60 Execution timed out 2089 ms 21604 KB Time limit exceeded
61 Halted 0 ms 0 KB -