oj.uz

답안 #55211

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
55211 2018-07-06T10:36:03 Z sebinkim 절취선 (JOI14_ho_t5) C++14
40 / 100
 642 ms 62544 KB 
#include <bits/stdc++.h>

using namespace std;

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

vector <ll> X, Y;
vector <pll> LX[202020], LY[202020];
vector <pll> PX[202020], PY[202020], Z[202020];
vector <pll> K;
vector <ll> L[202020], P[202020];
set <pll> S;
ll A[202020], B[202020], C[202020], D[202020];
ll T[606060], U[202020];
ll n, v, e, w, h, sz;

ll find(ll p) { return p == U[p]? p : U[p] = find(U[p]); }
void group(ll a, ll b)
{
	U[find(a)] = find(b);
}

void insert(ll p, ll v)
{
	p += sz;
	for(;p;p>>=1) T[p] += v;
}

ll get_sum(ll l, ll r)
{
	ll ret = 0;
	l += sz, r += sz;
	for(;l<r;){
		if(l & 1) ret += T[l];
		if(~r & 1) ret += T[r];
		l = l+1 >> 1;
		r = r-1 >> 1;
	}
	if(l == r) ret += T[l];
	
	return ret;
}

ll intersects(vector <pll> *E, vector <pll> *V, ll x)
{
	ll i, ret = 0;
	
	for(i=0;i<=x;i++){
		for(auto j: V[i]) insert(j.first, j.second);
		for(auto j: E[i]) ret += get_sum(j.first + 1, j.second - 1);
	}
	
	return ret;
}

int main()
{
	ll i, a, b, c, d;
	
	scanf("%lld%lld%lld", &w, &h, &n);
	
	X.push_back(0); Y.push_back(0);
	X.push_back(w); Y.push_back(h);
	
	for(i=1;i<=n;i++){
		scanf("%lld%lld%lld%lld", A+i, B+i, C+i, D+i);
		X.push_back(A[i]); Y.push_back(B[i]);
		X.push_back(C[i]); Y.push_back(D[i]);
	}
	
	n ++; A[n] = 0, B[n] = 0, C[n] = w, D[n] = 0; 
	n ++; A[n] = 0, B[n] = h, C[n] = w, D[n] = h;
	n ++; A[n] = 0, B[n] = 0, C[n] = 0, D[n] = h;
	n ++; A[n] = w, B[n] = 0, C[n] = w, D[n] = h;
	
	sort(X.begin(), X.end());
	X.erase(unique(X.begin(), X.end()), X.end());
	sort(Y.begin(), Y.end());
	Y.erase(unique(Y.begin(), Y.end()), Y.end());
	
	for(sz=1;sz<X.size() && sz<Y.size();sz<<=1);
	
	for(i=1;i<=n;i++){
		a = lower_bound(X.begin(), X.end(), A[i]) - X.begin();
		b = lower_bound(Y.begin(), Y.end(), B[i]) - Y.begin();
		c = lower_bound(X.begin(), X.end(), C[i]) - X.begin();
		d = lower_bound(Y.begin(), Y.end(), D[i]) - Y.begin();
		
		if(a == c){
			LX[a].push_back(pll(b, d));
			PY[b].push_back(pll(a, 1));	
			PY[d+1].push_back(pll(a, -1));
			
			if(b+1 <= d){
				Z[b+1].push_back(pll(a, 1));
				Z[d].push_back(pll(a, -1));
			}
		}
		else{
			LY[b].push_back(pll(a, c));
			PX[a].push_back(pll(b, 1));
			PX[c+1].push_back(pll(b, -1));
		}
		
		K.push_back(pll(a, b));
		K.push_back(pll(c, d));
	}
	
	sort(K.begin(), K.end());
	K.erase(unique(K.begin(), K.end()), K.end());
	
	v = K.size() + intersects(LY, Z, (ll)Y.size());
	e = n + intersects(LX, PX, (ll)X.size()) + intersects(LY, PY, (ll)Y.size());
	
	if(e > 5000000){
		printf("%lld\n", e - v + 1);
		return 0;
	}
	
	for(i=1;i<=n;i++){
		A[i] = a = lower_bound(X.begin(), X.end(), A[i]) - X.begin();
		B[i] = b = lower_bound(Y.begin(), Y.end(), B[i]) - Y.begin();
		C[i] = c = lower_bound(X.begin(), X.end(), C[i]) - X.begin();
		D[i] = d = lower_bound(Y.begin(), Y.end(), D[i]) - Y.begin();
		
		U[i] = i;
		
		if(a == c) L[a].push_back(i);
		else{
			P[a].push_back(i);
			P[c+1].push_back(-i);
		}
	}
	
	for(i=0;i<=X.size();i++){
		for(auto j: P[i]){
			if(j < 0) S.erase(pll(B[-j], -j));
			else S.insert(pll(B[j], j));
		}
		for(auto j: L[i]){
			auto it1 = S.lower_bound(pll(B[j], 0));
			auto it2 = S.lower_bound(pll(D[j], 1e9));
			for(; it1 != it2; it1++){
				group(j, it1 -> second);
			}
		}
	}
	
	c = 0;
	for(i=1;i<=n;i++) c += (i == U[i]);
	
	printf("%lld\n", e - v + c );
	
	return 0;
}

Compilation message

2014_ho_t5.cpp: In function 'll get_sum(ll, ll)':
2014_ho_t5.cpp:37:8: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   l = l+1 >> 1;
       ~^~
2014_ho_t5.cpp:38:8: warning: suggest parentheses around '-' inside '>>' [-Wparentheses]
   r = r-1 >> 1;
       ~^~
2014_ho_t5.cpp: In function 'int main()':
2014_ho_t5.cpp:82:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(sz=1;sz<X.size() && sz<Y.size();sz<<=1);
           ~~^~~~~~~~~
2014_ho_t5.cpp:82:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(sz=1;sz<X.size() && sz<Y.size();sz<<=1);
                          ~~^~~~~~~~~
2014_ho_t5.cpp:136:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(i=0;i<=X.size();i++){
          ~^~~~~~~~~~
2014_ho_t5.cpp:61:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld%lld%lld", &w, &h, &n);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
2014_ho_t5.cpp:67:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld%lld%lld%lld", A+i, B+i, C+i, D+i);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 33 ms 33656 KB Output is correct
2 Correct 32 ms 33656 KB Output is correct
3 Correct 30 ms 33716 KB Output is correct
4 Correct 32 ms 33772 KB Output is correct
5 Correct 37 ms 33848 KB Output is correct
6 Correct 32 ms 33848 KB Output is correct
7 Correct 28 ms 33976 KB Output is correct
8 Correct 31 ms 34120 KB Output is correct
9 Correct 31 ms 34120 KB Output is correct
10 Correct 38 ms 34148 KB Output is correct
11 Correct 37 ms 34192 KB Output is correct
12 Correct 35 ms 34192 KB Output is correct
13 Correct 36 ms 34192 KB Output is correct
14 Incorrect 35 ms 34192 KB Output isn't correct
15 Halted 0 ms 0 KB -

Subtask #2
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 33 ms 33656 KB Output is correct
2 Correct 32 ms 33656 KB Output is correct
3 Correct 30 ms 33716 KB Output is correct
4 Correct 32 ms 33772 KB Output is correct
5 Correct 37 ms 33848 KB Output is correct
6 Correct 32 ms 33848 KB Output is correct
7 Correct 28 ms 33976 KB Output is correct
8 Correct 31 ms 34120 KB Output is correct
9 Correct 31 ms 34120 KB Output is correct
10 Correct 38 ms 34148 KB Output is correct
11 Correct 37 ms 34192 KB Output is correct
12 Correct 35 ms 34192 KB Output is correct
13 Correct 36 ms 34192 KB Output is correct
14 Incorrect 35 ms 34192 KB Output isn't correct
15 Halted 0 ms 0 KB -

Subtask #3
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 32 ms 34192 KB Output is correct
2 Correct 31 ms 34192 KB Output is correct
3 Correct 34 ms 34192 KB Output is correct
4 Correct 33 ms 34192 KB Output is correct
5 Correct 87 ms 36684 KB Output is correct
6 Correct 342 ms 48096 KB Output is correct
7 Correct 642 ms 62544 KB Output is correct
8 Correct 615 ms 62544 KB Output is correct
9 Correct 570 ms 62544 KB Output is correct
10 Correct 554 ms 62544 KB Output is correct

Subtask #4
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 27 ms 62544 KB Output is correct
2 Correct 31 ms 62544 KB Output is correct
3 Correct 53 ms 62544 KB Output is correct
4 Correct 36 ms 62544 KB Output is correct
5 Correct 34 ms 62544 KB Output is correct
6 Correct 459 ms 62544 KB Output is correct
7 Correct 43 ms 62544 KB Output is correct
8 Correct 229 ms 62544 KB Output is correct
9 Correct 229 ms 62544 KB Output is correct
10 Correct 233 ms 62544 KB Output is correct

Subtask #5
0 / 50.0

# 결과 실행 시간 메모리 Grader output
1 Correct 33 ms 33656 KB Output is correct
2 Correct 32 ms 33656 KB Output is correct
3 Correct 30 ms 33716 KB Output is correct
4 Correct 32 ms 33772 KB Output is correct
5 Correct 37 ms 33848 KB Output is correct
6 Correct 32 ms 33848 KB Output is correct
7 Correct 28 ms 33976 KB Output is correct
8 Correct 31 ms 34120 KB Output is correct
9 Correct 31 ms 34120 KB Output is correct
10 Correct 38 ms 34148 KB Output is correct
11 Correct 37 ms 34192 KB Output is correct
12 Correct 35 ms 34192 KB Output is correct
13 Correct 36 ms 34192 KB Output is correct
14 Incorrect 35 ms 34192 KB Output isn't correct
15 Halted 0 ms 0 KB -