oj.uz

Submission #260038

# Submission time Handle Problem Language Result Execution time Memory
260038 2020-08-09T05:05:54 Z arnold518 Park (BOI16_park) C++14
100 / 100
 375 ms 40360 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 = 2000;
const int MAXM = 1e5;
const ll INF = 1e9;

struct Circle
{
	ll x, y, r;
};

struct Query
{
	ll r; int e, p;
	bool operator < (const Query &q) { return r<q.r; }
};

struct Edge
{
	int u, v; ll w;
	bool operator < (const Edge &p) { return w<p.w; }
};

int N, M;
ll W, H;
Circle A[MAXN+10];
Query B[MAXM+10];
vector<int> ans[MAXM+10];

ll mysqrt(ll x)
{
	ll lo=0, hi=INF;
	while(lo+1<hi)
	{
		ll mid=lo+hi>>1;
		if(mid*mid<=x) lo=mid;
		else hi=mid;
	}
	return hi;
}

int par[MAXN+10];

int Find(int x)
{
	if(x==par[x]) return x;
	return par[x]=Find(par[x]);
}

void Union(int x, int y)
{
	x=Find(x); y=Find(y);
	if(x==y) return;
	par[x]=y;
}

bool F[5][5];

int main()
{
	scanf("%d%d", &N, &M);
	scanf("%lld%lld", &W, &H);

	for(int i=1; i<=N+4; i++) par[i]=i;

	for(int i=1; i<=N; i++) scanf("%lld%lld%lld", &A[i].x, &A[i].y, &A[i].r);
	for(int i=1; i<=M; i++) scanf("%lld%d", &B[i].r, &B[i].e), B[i].p=i;
	sort(B+1, B+M+1);
	
	vector<Edge> V;
	for(int i=1; i<=N; i++) for(int j=i+1; j<=N; j++)
	{
		ll t=1+(sqrt((A[i].x-A[j].x)*(A[i].x-A[j].x)+(A[i].y-A[j].y)*(A[i].y-A[j].y))-A[i].r-A[j].r)/2; t=max(0ll, t);
		V.push_back({i, j, t});
	}
	for(int i=1; i<=N; i++)
	{
		ll t;
		t=1+(A[i].y-A[i].r)/2; t=max(t, 0ll);
		V.push_back({i, N+1, t});
		t=1+(W-A[i].x-A[i].r)/2; t=max(t, 0ll);
		V.push_back({i, N+2, t});
		t=1+(H-A[i].y-A[i].r)/2; t=max(t, 0ll);
		V.push_back({i, N+3, t});
		t=1+(A[i].x-A[i].r)/2; t=max(t, 0ll);
		V.push_back({i, N+4, t});
	}

	sort(V.begin(), V.end());
	//for(auto it : V) printf("%d %d : %lld\n", it.u, it.v, it.w);

	for(int i=1, j=0; i<=M; i++)
	{
		for(; j<V.size() && V[j].w<=B[i].r; j++) Union(V[j].u, V[j].v);
		
		for(int p=1; p<=4; p++) for(int q=1; q<=4; q++)
		{
			if(Find(N+p)==Find(N+q)) F[p][q]=1;
			else F[p][q]=0;
		}

		if(B[i].e==1)
		{
			ans[B[i].p].push_back(1);
			if(!(F[1][2] || F[1][3] || F[1][4])) ans[B[i].p].push_back(2);
			if(!(F[1][3] || F[1][4] || F[2][3] || F[2][4])) ans[B[i].p].push_back(3);
			if(!(F[4][1] || F[4][2] || F[4][3])) ans[B[i].p].push_back(4);
		}
		else if(B[i].e==2)
		{
			if(!(F[1][2] || F[1][3] || F[1][4])) ans[B[i].p].push_back(1);
			ans[B[i].p].push_back(2);
			if(!(F[2][1] || F[2][3] || F[2][4])) ans[B[i].p].push_back(3);
			if(!(F[1][3] || F[1][2] || F[3][4] || F[2][4])) ans[B[i].p].push_back(4);
		}
		else if(B[i].e==3)
		{
			if(!(F[1][3] || F[1][4] || F[2][3] || F[2][4])) ans[B[i].p].push_back(1);
			if(!(F[2][1] || F[2][3] || F[2][4])) ans[B[i].p].push_back(2);
			ans[B[i].p].push_back(3);
			if(!(F[3][1] || F[3][2] || F[3][4])) ans[B[i].p].push_back(4);
		}
		else
		{
			if(!(F[4][1] || F[4][2] || F[4][3])) ans[B[i].p].push_back(1);
			if(!(F[1][3] || F[1][2] || F[3][4] || F[2][4])) ans[B[i].p].push_back(2);
			if(!(F[3][1] || F[3][2] || F[3][4])) ans[B[i].p].push_back(3);
			ans[B[i].p].push_back(4);		
		}
	}
	for(int i=1; i<=M; i++)
	{
		for(auto it : ans[i]) printf("%d", it);
		printf("\n");
	}
}

Compilation message

park.cpp: In function 'll mysqrt(ll)':
park.cpp:40:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   ll mid=lo+hi>>1;
          ~~^~~
park.cpp: In function 'int main()':
park.cpp:99:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(; j<V.size() && V[j].w<=B[i].r; j++) Union(V[j].u, V[j].v);
         ~^~~~~~~~~
park.cpp:66:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &N, &M);
  ~~~~~^~~~~~~~~~~~~~~~
park.cpp:67:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld%lld", &W, &H);
  ~~~~~^~~~~~~~~~~~~~~~~~~~
park.cpp:71:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i=1; i<=N; i++) scanf("%lld%lld%lld", &A[i].x, &A[i].y, &A[i].r);
                          ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
park.cpp:72:59: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i=1; i<=M; i++) scanf("%lld%d", &B[i].r, &B[i].e), B[i].p=i;
                          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~

Subtask #1
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 276 ms 35788 KB Output is correct
2 Correct 272 ms 35788 KB Output is correct
3 Correct 266 ms 35796 KB Output is correct
4 Correct 292 ms 35772 KB Output is correct
5 Correct 269 ms 35788 KB Output is correct
6 Correct 279 ms 35772 KB Output is correct
7 Correct 262 ms 35772 KB Output is correct
8 Correct 247 ms 35788 KB Output is correct
9 Correct 2 ms 2688 KB Output is correct
10 Correct 2 ms 2688 KB Output is correct

Subtask #2
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 113 ms 9104 KB Output is correct
2 Correct 115 ms 9068 KB Output is correct
3 Correct 110 ms 9072 KB Output is correct
4 Correct 98 ms 9300 KB Output is correct
5 Correct 99 ms 9072 KB Output is correct
6 Correct 100 ms 9196 KB Output is correct
7 Correct 94 ms 8808 KB Output is correct
8 Correct 94 ms 8952 KB Output is correct

Subtask #3
42.0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 276 ms 35788 KB Output is correct
2 Correct 272 ms 35788 KB Output is correct
3 Correct 266 ms 35796 KB Output is correct
4 Correct 292 ms 35772 KB Output is correct
5 Correct 269 ms 35788 KB Output is correct
6 Correct 279 ms 35772 KB Output is correct
7 Correct 262 ms 35772 KB Output is correct
8 Correct 247 ms 35788 KB Output is correct
9 Correct 2 ms 2688 KB Output is correct
10 Correct 2 ms 2688 KB Output is correct
11 Correct 113 ms 9104 KB Output is correct
12 Correct 115 ms 9068 KB Output is correct
13 Correct 110 ms 9072 KB Output is correct
14 Correct 98 ms 9300 KB Output is correct
15 Correct 99 ms 9072 KB Output is correct
16 Correct 100 ms 9196 KB Output is correct
17 Correct 94 ms 8808 KB Output is correct
18 Correct 94 ms 8952 KB Output is correct
19 Correct 374 ms 40216 KB Output is correct
20 Correct 375 ms 40216 KB Output is correct
21 Correct 363 ms 40344 KB Output is correct
22 Correct 355 ms 40216 KB Output is correct
23 Correct 361 ms 40216 KB Output is correct
24 Correct 349 ms 40360 KB Output is correct