Submission #552666

#	Time	Username	Problem	Language	Result	Execution time	Memory
552666		QwertyPi	Palembang Bridges (APIO15_bridge)	C++14	22 / 100	127 ms	8380 KiB

bridge

#include <bits/stdc++.h>
#define fi first
#define se second
#define int long long
using namespace std;

typedef pair<int, int> pii;

int32_t main(){
	int k, n;
	cin >> k >> n;
	vector<pii> A;
	int add = 0;
	for(int i = 0; i < n; i++){
		char c1, c2; int p1, p2;
		cin >> c1 >> p1 >> c2 >> p2;
		add += abs(p2 - p1);
		if(c1 != c2) add++, A.push_back({min(p1, p2), max(p1, p2)});
	}
	
	int ans1 = 0, c1 = 0, p1 = 0;
	for(int i = 0; i < A.size(); i++){
		c1 += A[i].fi * 2;
	}
	ans1 = c1;
	int l = 0, r = A.size();
	vector<pair<int, int>> q;
	for(int i = 0; i < A.size(); i++){
		q.push_back({A[i].fi, i + 1});
		q.push_back({A[i].se, -i - 1});
	}
	sort(q.begin(), q.end());
	for(int i = 0; i < A.size() * 2; i++){
		c1 += (q[i].fi - p1) * (l - r) * 2;
		p1 = q[i].fi;
		ans1 = min(ans1, c1);
		if(q[i].se > 0) r--;
		else l++;
	}
	cout << add + ans1 << endl;
}

Compilation message (stderr)

bridge.cpp: In function 'int32_t main()':
bridge.cpp:22:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |  for(int i = 0; i < A.size(); i++){
      |                 ~~^~~~~~~~~~
bridge.cpp:28:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |  for(int i = 0; i < A.size(); i++){
      |                 ~~^~~~~~~~~~
bridge.cpp:33:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |  for(int i = 0; i < A.size() * 2; i++){
      |                 ~~^~~~~~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 14 / 14
• Subtask 3: 0 / 9
• Subtask 4: 0 / 32
• Subtask 5: 0 / 37