Submission #1028721

#	Time	Username	Problem	Language	Result	Execution time	Memory
1028721		vjudge1	Palembang Bridges (APIO15_bridge)	C++17	22 / 100	87 ms	6484 KiB

bridge

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;

ll n, k, sm, cnt;

vector<pair<ll, ll>> vec;
vector<ll> l, r, both;

int main(){
    cin >> k >> n;
    for (ll i = 0; i < n; i ++){
        char p, q;
        ll s, t;
        cin >> p >> s >> q >> t;

        if (s > t) swap(s, t);

        if (p == q){
            cnt++;
            sm += t - s;
        }
        else{
            vec.push_back({s, t});
            l.push_back(s);
            r.push_back(t);

            both.push_back(s);
            both.push_back(t);
        }
    }

    sort(vec.begin(), vec.end());
    sort(l.begin(), l.end());
    sort(r.begin(), r.end());
    sort(both.begin(), both.end());

    ll ans = 1e18;
    if (k == 1){
        ll prev = 0;
        ll after = 0;
        for (ll i = 1; i < both.size(); i ++)
            after += both[i] - both[0];
        ans = min(ans, sm + after + n - cnt);

        for (ll i = 1; i < both.size(); i ++){
            after -= (both[i] - both[i - 1]) * (both.size() - i);
            prev += (both[i] - both[i - 1]) * i;
            ans = min(ans, sm + prev + after + n - cnt);
        }
        cout << ans << endl;
    }
}

Compilation message (stderr)

bridge.cpp: In function 'int main()':
bridge.cpp:43:26: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |         for (ll i = 1; i < both.size(); i ++)
      |                        ~~^~~~~~~~~~~~~
bridge.cpp:47:26: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |         for (ll i = 1; i < both.size(); i ++){
      |                        ~~^~~~~~~~~~~~~

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