Submission #1022261

#	Time	Username	Problem	Language	Result	Execution time	Memory
1022261		TroySer	Palembang Bridges (APIO15_bridge)	C++17	22 / 100	99 ms	9364 KiB

bridge

// median?
#include <bits/stdc++.h>
 
using namespace std;
 
const long long int INF = 1e18;
 
long long int K, N;
long long int build1, build2;
char zone1, zone2;
 
long long int Dmin = 0;
 
struct Place {
    char zone;
    long long int building;
};

vector<pair<Place, Place> > people;
vector<long long int> person;
 
long long int cost(long long int currK) {
    long long int currMin = 0;
    for (int j = 0; j < people.size(); j++) {
        currMin += abs(people[j].first.building - currK);
        currMin++;
        currMin += abs(people[j].second.building - currK);
    }
    return currMin;
}
 
int main() {
    cin >> K >> N;
    for (int i = 0; i < N; i++) {
        cin >> zone1 >> build1 >> zone2 >> build2;
        if (zone1 == zone2) {
            Dmin += abs(build2 - build1);
        } else {
            people.push_back(make_pair(
                (Place){zone1, build1}, 
                (Place){zone2, build2}
            ));
            person.push_back(build1);
            person.push_back(build2);
        }
    }
 
    int M = person.size();
    long long int possibleMin = INF;

    if (M == 0) possibleMin = 0;
    else {
        sort(person.begin(), person.end());
        for (int i = M/2; i <= M/2 + 1; i++) {
            possibleMin = min(possibleMin, cost(person[i]));
        }
    }
 
    cout << possibleMin + Dmin << "\n";
}

Compilation message (stderr)

bridge.cpp: In function 'long long int cost(long long int)':
bridge.cpp:24:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<Place, Place> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |     for (int j = 0; j < people.size(); j++) {
      |                     ~~^~~~~~~~~~~~~~~

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