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Submission #109968

# Submission time Handle Problem Language Result Execution time Memory
109968 2019-05-08T13:23:49 Z Saboon Palembang Bridges (APIO15_bridge) C++14
63 / 100
 2000 ms 3312 KB 
#include <bits/stdc++.h>

using namespace std;
typedef long long ll;

const int maxn = 1e5 + 10;
const ll inf = 1e18;

vector<pair<int, int> > eve;
vector<ll> places;
ll Answer = inf;

ll calculate(int i, int j){
	ll sum = 0;
	for (auto k : eve){
		ll tmp = min(abs(k.first - places[i]) + abs(k.second - places[i]),
				abs(k.first - places[j]) + abs(k.second - places[j]));
		sum += tmp;
	}
	return sum;
}

void find(int L, int R, int l, int r){
	if (L >= R)
		return;
	int mid = (L + R) >> 1;
	ll k = inf, idx = -1;
	for (int i = l; i < min(mid, r); i++){
		ll tmp = calculate(i, mid);
		if (tmp < k){
			k = tmp;
			idx = i;
		}
	}
	Answer = min(Answer, k);
	find(L, mid, l, idx + 1);
	find(mid + 1, R, idx, r);
}

ll solve(){
	int n = eve.size();
	vector<ll> a(2 * n + 1);
	for (int i = 0; i < n; i++){
		a[2 * i + 0 + 1] = eve[i].first;
		a[2 * i + 1 + 1] = eve[i].second;
	}
	sort(a.begin() + 1, a.end());
	n = 2 * n;
	for (int i = 1; i <= n; i++)
		a[i] += a[i - 1];
	ll answer = inf;
	for (int i = 1; i <= n; i++){
		ll T = a[i] - a[i - 1];
		answer = min(answer, T * (i - (n - i)) - a[i] + (a[n] - a[i])); 
	}
	return answer + eve.size();
}

int main(){
	ios_base::sync_with_stdio(false);
	int k, n;
	cin >> k >> n;
	ll answer = 0;
	for (int i = 0; i < n; i++){
		int x, y;
		char a, b;
		cin >> a >> x >> b >> y;
		if (a == b){
			answer += abs(x - y);
			continue;
		}
		if (a == 'B')
			swap(x, y);
		eve.push_back({x, y});
	}
	if (eve.empty())
		return cout << answer << endl, 0;
	if (k == 1){
		cout << answer + solve() << '\n';
		return 0;
	}
	for (int i = 0; i < eve.size(); i++){
		places.push_back(eve[i].first);
		places.push_back(eve[i].second);
	}
	sort(places.begin(), places.end());
	int m = places.size();
	find(0, m, 0, m);
	cout << Answer + answer + eve.size() << endl;
	return 0;
}

Compilation message

bridge.cpp: In function 'int main()':
bridge.cpp:82:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < eve.size(); i++){
                  ~~^~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 3 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 3 ms 384 KB Output is correct
6 Correct 2 ms 412 KB Output is correct
7 Correct 2 ms 384 KB Output is correct
8 Correct 2 ms 384 KB Output is correct
9 Correct 3 ms 384 KB Output is correct
10 Correct 4 ms 384 KB Output is correct
11 Correct 3 ms 384 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 3 ms 384 KB Output is correct
5 Correct 3 ms 384 KB Output is correct
6 Correct 3 ms 384 KB Output is correct
7 Correct 3 ms 384 KB Output is correct
8 Correct 3 ms 384 KB Output is correct
9 Correct 3 ms 384 KB Output is correct
10 Correct 3 ms 384 KB Output is correct
11 Correct 3 ms 384 KB Output is correct
12 Correct 29 ms 2780 KB Output is correct
13 Correct 48 ms 2928 KB Output is correct
14 Correct 51 ms 2544 KB Output is correct
15 Correct 31 ms 1788 KB Output is correct
16 Correct 37 ms 2928 KB Output is correct
17 Correct 39 ms 2800 KB Output is correct
18 Correct 50 ms 2984 KB Output is correct
19 Correct 50 ms 2800 KB Output is correct
20 Correct 50 ms 2800 KB Output is correct
21 Correct 49 ms 2964 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 284 KB Output is correct
2 Correct 3 ms 256 KB Output is correct
3 Correct 3 ms 412 KB Output is correct
4 Correct 4 ms 384 KB Output is correct
5 Correct 3 ms 384 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 3 ms 384 KB Output is correct
8 Correct 4 ms 384 KB Output is correct
9 Correct 4 ms 384 KB Output is correct
10 Correct 3 ms 384 KB Output is correct
11 Correct 4 ms 384 KB Output is correct
12 Correct 3 ms 384 KB Output is correct

Subtask #4
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 3 ms 384 KB Output is correct
4 Correct 3 ms 512 KB Output is correct
5 Correct 3 ms 384 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 3 ms 384 KB Output is correct
8 Correct 3 ms 384 KB Output is correct
9 Correct 3 ms 384 KB Output is correct
10 Correct 3 ms 384 KB Output is correct
11 Correct 3 ms 304 KB Output is correct
12 Correct 3 ms 384 KB Output is correct
13 Correct 83 ms 384 KB Output is correct
14 Correct 79 ms 504 KB Output is correct
15 Correct 71 ms 384 KB Output is correct
16 Correct 7 ms 384 KB Output is correct
17 Correct 25 ms 384 KB Output is correct
18 Correct 11 ms 384 KB Output is correct
19 Correct 74 ms 408 KB Output is correct
20 Correct 74 ms 504 KB Output is correct
21 Correct 72 ms 384 KB Output is correct
22 Correct 66 ms 384 KB Output is correct
23 Correct 70 ms 504 KB Output is correct
24 Correct 74 ms 504 KB Output is correct

Subtask #5
0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 3 ms 384 KB Output is correct
3 Correct 3 ms 384 KB Output is correct
4 Correct 3 ms 384 KB Output is correct
5 Correct 3 ms 432 KB Output is correct
6 Correct 3 ms 256 KB Output is correct
7 Correct 3 ms 384 KB Output is correct
8 Correct 3 ms 384 KB Output is correct
9 Correct 3 ms 384 KB Output is correct
10 Correct 3 ms 384 KB Output is correct
11 Correct 3 ms 384 KB Output is correct
12 Correct 3 ms 384 KB Output is correct
13 Correct 79 ms 420 KB Output is correct
14 Correct 100 ms 460 KB Output is correct
15 Correct 75 ms 384 KB Output is correct
16 Correct 9 ms 384 KB Output is correct
17 Correct 35 ms 456 KB Output is correct
18 Correct 12 ms 384 KB Output is correct
19 Correct 70 ms 384 KB Output is correct
20 Correct 66 ms 424 KB Output is correct
21 Correct 81 ms 384 KB Output is correct
22 Correct 78 ms 384 KB Output is correct
23 Correct 83 ms 420 KB Output is correct
24 Correct 73 ms 384 KB Output is correct
25 Execution timed out 2044 ms 3312 KB Time limit exceeded
26 Halted 0 ms 0 KB -