oj.uz

Submission #257644

# Submission time Handle Problem Language Result Execution time Memory
257644 2020-08-04T13:57:50 Z arnold518 Joker (BOI20_joker) C++14
14 / 100
 2000 ms 27744 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 = 210;

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 7 ms 9728 KB Output is correct
2 Correct 7 ms 9728 KB Output is correct
3 Correct 5 ms 9728 KB Output is correct
4 Correct 6 ms 9728 KB Output is correct
5 Correct 7 ms 9728 KB Output is correct
6 Correct 7 ms 9728 KB Output is correct
7 Correct 6 ms 9728 KB Output is correct
8 Correct 7 ms 9728 KB Output is correct
9 Correct 6 ms 9728 KB Output is correct
10 Correct 7 ms 9728 KB Output is correct
11 Correct 6 ms 9728 KB Output is correct
12 Correct 6 ms 9728 KB Output is correct
13 Correct 6 ms 9728 KB Output is correct
14 Correct 7 ms 9728 KB Output is correct
15 Correct 6 ms 9728 KB Output is correct
16 Correct 8 ms 9728 KB Output is correct
17 Correct 8 ms 9728 KB Output is correct
18 Correct 7 ms 9728 KB Output is correct
19 Correct 7 ms 9728 KB Output is correct
20 Correct 8 ms 9728 KB Output is correct
21 Correct 8 ms 9728 KB Output is correct
22 Correct 6 ms 9728 KB Output is correct
23 Correct 9 ms 9728 KB Output is correct
24 Correct 7 ms 9728 KB Output is correct
25 Correct 6 ms 9728 KB Output is correct
26 Correct 7 ms 9728 KB Output is correct
27 Correct 7 ms 9728 KB Output is correct
28 Correct 6 ms 9728 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 9728 KB Output is correct
2 Correct 7 ms 9728 KB Output is correct
3 Correct 5 ms 9728 KB Output is correct
4 Correct 6 ms 9728 KB Output is correct
5 Correct 7 ms 9728 KB Output is correct
6 Correct 7 ms 9728 KB Output is correct
7 Correct 6 ms 9728 KB Output is correct
8 Correct 7 ms 9728 KB Output is correct
9 Correct 6 ms 9728 KB Output is correct
10 Correct 7 ms 9728 KB Output is correct
11 Correct 6 ms 9728 KB Output is correct
12 Correct 6 ms 9728 KB Output is correct
13 Correct 6 ms 9728 KB Output is correct
14 Correct 7 ms 9728 KB Output is correct
15 Correct 6 ms 9728 KB Output is correct
16 Correct 8 ms 9728 KB Output is correct
17 Correct 8 ms 9728 KB Output is correct
18 Correct 7 ms 9728 KB Output is correct
19 Correct 7 ms 9728 KB Output is correct
20 Correct 8 ms 9728 KB Output is correct
21 Correct 8 ms 9728 KB Output is correct
22 Correct 6 ms 9728 KB Output is correct
23 Correct 9 ms 9728 KB Output is correct
24 Correct 7 ms 9728 KB Output is correct
25 Correct 6 ms 9728 KB Output is correct
26 Correct 7 ms 9728 KB Output is correct
27 Correct 7 ms 9728 KB Output is correct
28 Correct 6 ms 9728 KB Output is correct
29 Correct 14 ms 9856 KB Output is correct
30 Correct 13 ms 9856 KB Output is correct
31 Correct 17 ms 9856 KB Output is correct
32 Correct 12 ms 9856 KB Output is correct
33 Correct 12 ms 9856 KB Output is correct
34 Correct 16 ms 9856 KB Output is correct
35 Correct 15 ms 9856 KB Output is correct
36 Correct 12 ms 9944 KB Output is correct
37 Correct 15 ms 9984 KB Output is correct
38 Correct 16 ms 9984 KB Output is correct
39 Correct 20 ms 9856 KB Output is correct
40 Correct 19 ms 9856 KB Output is correct
41 Correct 19 ms 9856 KB Output is correct
42 Correct 23 ms 9856 KB Output is correct
43 Correct 61 ms 9936 KB Output is correct
44 Correct 54 ms 9976 KB Output is correct
45 Correct 11 ms 9856 KB Output is correct
46 Correct 14 ms 9984 KB Output is correct
47 Correct 71 ms 9888 KB Output is correct
48 Correct 24 ms 9856 KB Output is correct
49 Correct 14 ms 9856 KB Output is correct
50 Correct 15 ms 9972 KB Output is correct
51 Correct 61 ms 9856 KB Output is correct
52 Correct 55 ms 9856 KB Output is correct
53 Correct 38 ms 9856 KB Output is correct
54 Correct 17 ms 9856 KB Output is correct

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 9728 KB Output is correct
2 Correct 7 ms 9728 KB Output is correct
3 Correct 147 ms 23776 KB Output is correct
4 Correct 157 ms 27744 KB Output is correct
5 Correct 145 ms 27236 KB Output is correct
6 Correct 146 ms 23748 KB Output is correct
7 Correct 176 ms 23776 KB Output is correct
8 Execution timed out 2068 ms 21816 KB Time limit exceeded
9 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 9728 KB Output is correct
2 Correct 7 ms 9728 KB Output is correct
3 Correct 5 ms 9728 KB Output is correct
4 Correct 6 ms 9728 KB Output is correct
5 Correct 7 ms 9728 KB Output is correct
6 Correct 7 ms 9728 KB Output is correct
7 Correct 6 ms 9728 KB Output is correct
8 Correct 7 ms 9728 KB Output is correct
9 Correct 6 ms 9728 KB Output is correct
10 Correct 7 ms 9728 KB Output is correct
11 Correct 6 ms 9728 KB Output is correct
12 Correct 6 ms 9728 KB Output is correct
13 Correct 6 ms 9728 KB Output is correct
14 Correct 7 ms 9728 KB Output is correct
15 Correct 6 ms 9728 KB Output is correct
16 Correct 8 ms 9728 KB Output is correct
17 Correct 8 ms 9728 KB Output is correct
18 Correct 7 ms 9728 KB Output is correct
19 Correct 7 ms 9728 KB Output is correct
20 Correct 8 ms 9728 KB Output is correct
21 Correct 8 ms 9728 KB Output is correct
22 Correct 6 ms 9728 KB Output is correct
23 Correct 9 ms 9728 KB Output is correct
24 Correct 7 ms 9728 KB Output is correct
25 Correct 6 ms 9728 KB Output is correct
26 Correct 7 ms 9728 KB Output is correct
27 Correct 7 ms 9728 KB Output is correct
28 Correct 6 ms 9728 KB Output is correct
29 Correct 147 ms 23776 KB Output is correct
30 Correct 157 ms 27744 KB Output is correct
31 Correct 145 ms 27236 KB Output is correct
32 Correct 146 ms 23748 KB Output is correct
33 Correct 176 ms 23776 KB Output is correct
34 Execution timed out 2068 ms 21816 KB Time limit exceeded
35 Halted 0 ms 0 KB -

Subtask #5
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 9728 KB Output is correct
2 Correct 7 ms 9728 KB Output is correct
3 Correct 5 ms 9728 KB Output is correct
4 Correct 6 ms 9728 KB Output is correct
5 Correct 7 ms 9728 KB Output is correct
6 Correct 7 ms 9728 KB Output is correct
7 Correct 6 ms 9728 KB Output is correct
8 Correct 7 ms 9728 KB Output is correct
9 Correct 6 ms 9728 KB Output is correct
10 Correct 7 ms 9728 KB Output is correct
11 Correct 6 ms 9728 KB Output is correct
12 Correct 6 ms 9728 KB Output is correct
13 Correct 6 ms 9728 KB Output is correct
14 Correct 7 ms 9728 KB Output is correct
15 Correct 6 ms 9728 KB Output is correct
16 Correct 8 ms 9728 KB Output is correct
17 Correct 8 ms 9728 KB Output is correct
18 Correct 7 ms 9728 KB Output is correct
19 Correct 7 ms 9728 KB Output is correct
20 Correct 8 ms 9728 KB Output is correct
21 Correct 8 ms 9728 KB Output is correct
22 Correct 6 ms 9728 KB Output is correct
23 Correct 9 ms 9728 KB Output is correct
24 Correct 7 ms 9728 KB Output is correct
25 Correct 6 ms 9728 KB Output is correct
26 Correct 7 ms 9728 KB Output is correct
27 Correct 7 ms 9728 KB Output is correct
28 Correct 6 ms 9728 KB Output is correct
29 Correct 14 ms 9856 KB Output is correct
30 Correct 13 ms 9856 KB Output is correct
31 Correct 17 ms 9856 KB Output is correct
32 Correct 12 ms 9856 KB Output is correct
33 Correct 12 ms 9856 KB Output is correct
34 Correct 16 ms 9856 KB Output is correct
35 Correct 15 ms 9856 KB Output is correct
36 Correct 12 ms 9944 KB Output is correct
37 Correct 15 ms 9984 KB Output is correct
38 Correct 16 ms 9984 KB Output is correct
39 Correct 20 ms 9856 KB Output is correct
40 Correct 19 ms 9856 KB Output is correct
41 Correct 19 ms 9856 KB Output is correct
42 Correct 23 ms 9856 KB Output is correct
43 Correct 61 ms 9936 KB Output is correct
44 Correct 54 ms 9976 KB Output is correct
45 Correct 11 ms 9856 KB Output is correct
46 Correct 14 ms 9984 KB Output is correct
47 Correct 71 ms 9888 KB Output is correct
48 Correct 24 ms 9856 KB Output is correct
49 Correct 14 ms 9856 KB Output is correct
50 Correct 15 ms 9972 KB Output is correct
51 Correct 61 ms 9856 KB Output is correct
52 Correct 55 ms 9856 KB Output is correct
53 Correct 38 ms 9856 KB Output is correct
54 Correct 17 ms 9856 KB Output is correct
55 Correct 1568 ms 15868 KB Output is correct
56 Execution timed out 2062 ms 20328 KB Time limit exceeded
57 Halted 0 ms 0 KB -

Subtask #6
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 9728 KB Output is correct
2 Correct 7 ms 9728 KB Output is correct
3 Correct 5 ms 9728 KB Output is correct
4 Correct 6 ms 9728 KB Output is correct
5 Correct 7 ms 9728 KB Output is correct
6 Correct 7 ms 9728 KB Output is correct
7 Correct 6 ms 9728 KB Output is correct
8 Correct 7 ms 9728 KB Output is correct
9 Correct 6 ms 9728 KB Output is correct
10 Correct 7 ms 9728 KB Output is correct
11 Correct 6 ms 9728 KB Output is correct
12 Correct 6 ms 9728 KB Output is correct
13 Correct 6 ms 9728 KB Output is correct
14 Correct 7 ms 9728 KB Output is correct
15 Correct 6 ms 9728 KB Output is correct
16 Correct 8 ms 9728 KB Output is correct
17 Correct 8 ms 9728 KB Output is correct
18 Correct 7 ms 9728 KB Output is correct
19 Correct 7 ms 9728 KB Output is correct
20 Correct 8 ms 9728 KB Output is correct
21 Correct 8 ms 9728 KB Output is correct
22 Correct 6 ms 9728 KB Output is correct
23 Correct 9 ms 9728 KB Output is correct
24 Correct 7 ms 9728 KB Output is correct
25 Correct 6 ms 9728 KB Output is correct
26 Correct 7 ms 9728 KB Output is correct
27 Correct 7 ms 9728 KB Output is correct
28 Correct 6 ms 9728 KB Output is correct
29 Correct 14 ms 9856 KB Output is correct
30 Correct 13 ms 9856 KB Output is correct
31 Correct 17 ms 9856 KB Output is correct
32 Correct 12 ms 9856 KB Output is correct
33 Correct 12 ms 9856 KB Output is correct
34 Correct 16 ms 9856 KB Output is correct
35 Correct 15 ms 9856 KB Output is correct
36 Correct 12 ms 9944 KB Output is correct
37 Correct 15 ms 9984 KB Output is correct
38 Correct 16 ms 9984 KB Output is correct
39 Correct 20 ms 9856 KB Output is correct
40 Correct 19 ms 9856 KB Output is correct
41 Correct 19 ms 9856 KB Output is correct
42 Correct 23 ms 9856 KB Output is correct
43 Correct 61 ms 9936 KB Output is correct
44 Correct 54 ms 9976 KB Output is correct
45 Correct 11 ms 9856 KB Output is correct
46 Correct 14 ms 9984 KB Output is correct
47 Correct 71 ms 9888 KB Output is correct
48 Correct 24 ms 9856 KB Output is correct
49 Correct 14 ms 9856 KB Output is correct
50 Correct 15 ms 9972 KB Output is correct
51 Correct 61 ms 9856 KB Output is correct
52 Correct 55 ms 9856 KB Output is correct
53 Correct 38 ms 9856 KB Output is correct
54 Correct 17 ms 9856 KB Output is correct
55 Correct 147 ms 23776 KB Output is correct
56 Correct 157 ms 27744 KB Output is correct
57 Correct 145 ms 27236 KB Output is correct
58 Correct 146 ms 23748 KB Output is correct
59 Correct 176 ms 23776 KB Output is correct
60 Execution timed out 2068 ms 21816 KB Time limit exceeded
61 Halted 0 ms 0 KB -