Submission #585453

#	Time	Username	Problem	Language	Result	Execution time	Memory
585453		Tien_Noob	Palembang Bridges (APIO15_bridge)	C++17	22 / 100	218 ms	14388 KiB

bridge

//Make CSP great again
//Vengeance
#include <bits/stdc++.h>
#define TASK "TESTCODE"
#define Log2(x) 31 - __builtin_clz(x)
using namespace std;
const int N = 1e5;
int k, n;
long long add, res = 1e18;
set<int> pos;
multiset<pair<int, int> > L, mid, R;
int cnt[2];
long long sum[3];
void read()
{
    cin >> k >> n;
    if (k > 1)
    {
        exit(0);
    }
    while(n--)
    {
        char P, Q;
        int s, t;
        cin >> P >> s >> Q >> t;
        if (P == Q)
        {
            add += abs(s - t);
            continue;
        }
        pos.insert(s);
        pos.insert(t);
        if (s > t)
        {
            swap(s, t);
        }
        L.insert({s, t});
        //R.insert({t, s});
        ++cnt[1];
        sum[1] += s + t;
        ++add;
    }
}
void solve()
{
    if (pos.empty())
    {
        cout << add;
        return ;
    }
    for (int x : pos)
    {
        while(!L.empty() && L.begin()->first <= x)
        {
            sum[2] += L.begin()->second - L.begin()->first;
            --cnt[1];
            sum[1] -= L.begin()->first + L.begin()->second;
            mid.insert({L.begin()->second, L.begin()->first});
            L.erase(L.begin());
        }
        while(!mid.empty() && mid.begin()->first <= x)
        {
            ++cnt[0];
            sum[0] += mid.begin()->first + mid.begin()->second;
            sum[2] -= mid.begin()->first - mid.begin()->second;
            mid.erase(mid.begin());
        }
        res = min(res, 2LL * x * cnt[0] - sum[0] + sum[1] - 2LL * cnt[1] * x + sum[2]);
    }
    cout << res + add;
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    if (fopen(TASK".INP", "r"))
    {
        freopen(TASK".INP", "r", stdin);
        //freopen(TASK".OUT", "w", stdout);
    }
    int t = 1;
    bool typetest = false;
    if (typetest)
    {
        cin >> t;
    }
    for (int __ = 1; __ <= t; ++ __)
    {
        //cout << "Case " << __ << ": ";
        read();
        solve();
    }
}

Compilation message (stderr)

bridge.cpp: In function 'int main()':
bridge.cpp:78:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   78 |         freopen(TASK".INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

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