Submission #585495

#	Time	Username	Problem	Language	Result	Execution time	Memory
585495		Huy	Palembang Bridges (APIO15_bridge)	C++17	22 / 100	68 ms	7000 KiB

bridge

#include<bits/stdc++.h>
#define int long long
#define pii pair<int,ll>
#define fi first
#define se second
/*#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
#pragma GCC optimize("Ofast")
#pragma GCC target("avx,avx2,fma")*/
using namespace std;
using ll = long long;
using ull = unsigned long long;
using ldb = long double;
const ll N = (int)1e9 + 1;
const int maxN = (int)1e6 + 1;
const int mod = 1e9 + 7;
//const int mod = 998244353;
const int infty = 1e18 + 7;
const int base = (int)4e5;

void InputFile()
{
    //freopen("scrivener.inp","r",stdin);
    //freopen("scrivener.out","w",stdout);
    //freopen("test.out","r",stdin);
}

void FastInput()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
}

int k,n;
char P[maxN],Q[maxN];
int S[maxN],T[maxN];
vector<int> pnt;
vector<int> vc;
vector<int> vc1;

void Read()
{
    cin >> k >> n;
    int su = 0;
    int res = infty;
    int dak = 0;
    for(int i = 1;i <= n;i++)
    {
        cin >> P[i] >> S[i] >> Q[i] >> T[i];
        pnt.push_back(S[i]);
        pnt.push_back(T[i]);
        if(P[i] != Q[i])
        {
            vc.push_back(S[i]);
            vc.push_back(T[i]);
            dak++;
        }
        else
        {
            su += abs(S[i]-T[i]);
        }
    }

    if(vc.empty())
    {
        cout << su;
        return;
    }

    sort(vc.begin(),vc.end());
    vc1.resize(vc.size());
    for(int i = 0;i < vc.size();i++)
    {
        if(i == 0)
        {
            vc1[i] = vc[i];
        }
        else
        {
            vc1[i] = vc[i] + vc1[i-1];
        }
    }

    for(int i : pnt)
    {
        int check = 0;
        int id = upper_bound(vc.begin(),vc.end(),i) - vc.begin();
        int chigh = vc.size() - id;
        int clow = id;
        if(clow > 0) check += i * clow - vc1[clow-1];
        int h = vc1[(int)vc1.size()-1];
        if(id > 0) h -= vc1[id-1];
        check += h - i * chigh;
        res = min(res,check + su + dak);
    }
    cout << res;
}

void Solve()
{

}

void Debug()
{

}


int32_t main()
{
    FastInput();
    //InputFile();
    //int sub_type;
    //cin >> sub_type;
    //Sieve();
    //Prepare();
    int test;
    //cin >> test;
    test = 1;
    while(test--)
        //for(int prc = 1; prc <= test; prc++)
    {
        Read();
        Solve();
        //Debug();
    }
}

/*
1 5
B 0 A 4
B 1 B 3
A 5 B 7
B 2 A 6
B 1 A 7
*/

Compilation message (stderr)

bridge.cpp: In function 'void Read()':
bridge.cpp:73:21: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   73 |     for(int i = 0;i < vc.size();i++)
      |                   ~~^~~~~~~~~~~

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