oj.uz

답안 #33630

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
33630 2017-10-31T02:44:44 Z sinhriv Palembang Bridges (APIO15_bridge) C++14
22 / 100
 83 ms 6744 KB 
#include <bits/stdc++.h>

using namespace std;

struct Point{
	int x;
	int y;

	void read(){
		char read[5];
		scanf("%s%d", read, &y);
		x = (read[0] - 'A');
	}
};	

struct Person{
	Point u;
	Point v;

	bool check(){
		u.read();
		v.read();
		return (u.x == v.x);
	}

	int calc(int val){
		return abs(u.y - val) + abs(v.y - val);
	}
};

vector < pair < int, int > > a;

long long One(){
	if(a.size() == 0) return 0;
	int n = a.size();
	vector < int > lst;

	for(int i = 0; i < n; ++i){
		lst.push_back(a[i].first);
		lst.push_back(a[i].second);
	}

	sort(lst.begin(), lst.end());

	long long ans = 0;


	for(int i = 0; i < n + n; ++i){
		ans += abs(lst[i] - lst[n]);
	}
	return ans + n; 
}

struct lex_compare {
  bool operator() (const pair < int, int >& x, const pair < int, int >&y) const {
  	if(x.first + x.second == y.first + y.second) {
  		if(x.first == y.first) return x.second < y.second;
  		return x.first < y.first;
  	}
  	return x.first + x.second < y.first + y.second;
  }
};


struct second_compare {
  bool operator() (const pair < int, int >& x, const pair < int, int >&y) const {
  	if(x.second != y.second) return x.second  < y.second;
  	return x.first < y.first;
  }
};

const int N = 2e5 + 10;

long long prefix[N];

int calc(pair < int, int > p, int val){
	return abs(p.first - val) + abs(p.second - val);
}

long long Two(){
	int n = a.size();
	if(n == 0) return 0;

	vector < int > lst;

	for(int i = 0; i < n; ++i){
		if(a[i].first > a[i].second){
			swap(a[i].first, a[i].second);
		}
		lst.push_back(a[i].first);
		lst.push_back(a[i].second);

	}

	sort(a.begin(), a.end());
	sort(lst.begin(), lst.end());
	lst.resize(unique(lst.begin(), lst.end()) - lst.begin());

	for(int i = 0; i < n; ++i){
		prefix[i] = a[i].first + a[i].second;
		if(i > 0) prefix[i] += prefix[i - 1];
	}

	int small = 0;

	long long sum = 0;
	long long total = 0;
	
	long long ans = 1e18;

	multiset < int > tree;



	for(int i = 0; i < lst.size(); ++i){
		int x = lst[i];
		while(small < n && a[small].first <= x){
			sum += a[small].second;
			total += a[small].first;
			tree.insert(a[small].second);
			++small;
		}
		while(!tree.empty() && *tree.begin() <= x){
			sum -= *tree.begin() * 2;
			tree.erase(tree.begin());
		}


		long long now = (1LL * small * x - total) + (sum + 1LL * (small - 2 * tree.size()) * x);
	
		multiset < pair < int, int >, lex_compare > inside;	
		multiset < pair < int, int >, second_compare > big;
		
		long long sumBig = 0;
		long long sumInside = 0;
		long long sumOutside = 0;

		int pter = small;		
		for(int j = i + 1; j < lst.size(); ++j){
			int y = lst[j];
			int where = lower_bound(a.begin(), a.end(), make_pair(y, 0)) - a.begin();

			long long most = prefix[n - 1] - (where > 0 ? prefix[where - 1] : 0) - 2LL * (n - where) * y;

			
			while(pter < where){
				if(a[pter].second >= y){
					big.insert(a[pter]);
					sumBig += calc(a[pter], y);
				}
				else{
					inside.insert(a[pter]);
					sumInside += calc(a[pter], y);
				}
				++pter;
			}
			
			while(!big.empty() && big.begin() -> second < y){
				sumBig -= calc(*big.begin(), y);
				sumInside += calc(*big.begin(), y);
				inside.insert(*big.begin());
				big.erase(big.begin());
			}

			while(!inside.empty()){
				auto p = *inside.begin();
				if(p.first + p.second <= x + y){
					sumInside -= calc(p, y);
					sumOutside += calc(p, x);
					inside.erase(inside.begin());
					continue;
				}
				break; 
			}

			ans = min(ans, sumInside + sumOutside + sumBig + most + now);
		}
	}

	return n + ans;
}

int main(){
	if(fopen("1.inp", "r")){
		freopen("1.inp", "r", stdin);
	}

	long long out = 0;

	int k, n;
	scanf("%d%d", &k, &n);

	for(int i = 1; i <= n; ++i){
		Person x;
		if(x.check()){
			out += x.calc(x.u.y);
		}
		else{
			a.emplace_back(x.u.y, x.v.y);
		}
	}

	if(k == 1) cout << One() + out;
	else{
		cout << min(One(), Two()) + out;
	}
	return 0;
}

Compilation message

bridge.cpp: In function 'long long int Two()':
bridge.cpp:115:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < lst.size(); ++i){
                   ^
bridge.cpp:139:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int j = i + 1; j < lst.size(); ++j){
                        ^
bridge.cpp: In function 'int main()':
bridge.cpp:185:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   freopen("1.inp", "r", stdin);
                               ^
bridge.cpp:191:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &k, &n);
                       ^
bridge.cpp: In member function 'void Point::read()':
bridge.cpp:11:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%s%d", read, &y);
                          ^

Subtask #1
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 3588 KB Output is correct
2 Correct 0 ms 3588 KB Output is correct
3 Correct 0 ms 3588 KB Output is correct
4 Correct 0 ms 3588 KB Output is correct
5 Correct 0 ms 3588 KB Output is correct
6 Correct 0 ms 3588 KB Output is correct
7 Correct 0 ms 3588 KB Output is correct
8 Correct 0 ms 3588 KB Output is correct
9 Correct 0 ms 3588 KB Output is correct
10 Correct 0 ms 3588 KB Output is correct
11 Correct 0 ms 3588 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 3588 KB Output is correct
2 Correct 0 ms 3588 KB Output is correct
3 Correct 0 ms 3588 KB Output is correct
4 Correct 0 ms 3588 KB Output is correct
5 Correct 0 ms 3588 KB Output is correct
6 Correct 0 ms 3588 KB Output is correct
7 Correct 0 ms 3588 KB Output is correct
8 Correct 0 ms 3588 KB Output is correct
9 Correct 0 ms 3588 KB Output is correct
10 Correct 0 ms 3588 KB Output is correct
11 Correct 0 ms 3588 KB Output is correct
12 Correct 33 ms 6744 KB Output is correct
13 Correct 83 ms 6744 KB Output is correct
14 Correct 43 ms 6744 KB Output is correct
15 Correct 36 ms 5208 KB Output is correct
16 Correct 66 ms 6744 KB Output is correct
17 Correct 29 ms 6744 KB Output is correct
18 Correct 66 ms 6744 KB Output is correct
19 Correct 63 ms 6744 KB Output is correct
20 Correct 36 ms 6744 KB Output is correct
21 Correct 49 ms 6744 KB Output is correct

Subtask #3
0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 3588 KB Output is correct
2 Correct 0 ms 3588 KB Output is correct
3 Correct 0 ms 3588 KB Output is correct
4 Incorrect 0 ms 3588 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #4
0 / 32.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 3588 KB Output is correct
2 Correct 0 ms 3588 KB Output is correct
3 Correct 0 ms 3588 KB Output is correct
4 Incorrect 0 ms 3588 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #5
0 / 37.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 3588 KB Output is correct
2 Correct 0 ms 3588 KB Output is correct
3 Correct 0 ms 3588 KB Output is correct
4 Incorrect 0 ms 3588 KB Output isn't correct
5 Halted 0 ms 0 KB -