Submission #474329

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
474329	2021-09-18T02:57:34 Z	Lam_lai_cuoc_doi	Job Scheduling (IOI19_job)	C++17	19 / 100	255 ms	17344 KB

#include <bits/stdc++.h>

using namespace std;
using ll = long long;
using ld = long double;
using ull = unsigned long long;

template <class T>
void read(T &x)
{
    x = 0;
    register int c;
    while ((c = getchar()) && (c > '9' || c < '0'))
        ;
    for (; c >= '0' && c <= '9'; c = getchar())
        x = x * 10 + c - '0';
}

constexpr bool typetest = 0;
constexpr int N = 2e5 + 5;
constexpr int Inf = 1e9 + 7;

struct dsu
{
    int par[N];
    dsu()
    {
        memset(par, -1, sizeof par);
    }
    int findpar(int v)
    {
        return par[v] < 0 ? v : par[v] = findpar(par[v]);
    }
} f;

struct Fraction
{
    ll a, b;
    Fraction(ll a = 0, ll b = 1) : a(a), b(b)
    {
        Normalize();
    }

    inline void Normalize()
    {
        ll v = __gcd(a, b);
        a /= v;
        b /= v;

        if (b < 0)
        {
            a = -a;
            b = -b;
        }
    }
    bool operator<(const Fraction &x) const
    {
        return a * x.b < b * x.a;
    }
    bool operator==(const Fraction &x) const
    {
        return a * x.b == b * x.a;
    }
};

ll scheduling_cost(vector<int> p, vector<int> u, vector<int> d)
{
    int n = p.size();
    /*if (count(p.begin(), p.end(), 0) == n - 1)
    {

        vector<int> id(n);
        for (int i = 0; i < n; ++i)
            id[i] = i;
        sort(id.begin() + 1, id.end(), [&](const int &x, const int &y)
             { return d[x] * u[y] < d[y] * u[x]; });

        ll ans(0), time(0);
        for (int i = 0; i < n; ++i)
        {
            time += d[id[i]];
            //cout << id[i] << " " << time << "\n";
            ans += u[id[i]] * time;
        }
        return ans;
    }*/

    ll ans(0), time(0);
    vector<Fraction> ud(n);

    struct Tque
    {
        Fraction x;
        int v;
        Tque(Fraction x = Fraction(0, 1), ll v = 0) : x(x), v(v) {}

        bool operator<(const Tque &a) const
        {
            return x < a.x || (x == a.x && v > a.v);
        }
    };

    priority_queue<Tque> q;

    for (int i = 0; i < n; ++i)
    {
        ud[i] = Fraction(u[i], d[i]);
        q.emplace(ud[i], i);
    }

    while (!q.empty())
    {
        Tque c = q.top();
        q.pop();

        if (!(c.x == ud[c.v]))
            continue;

        if (p[c.v] == -1 || ud[f.findpar(p[c.v])] == Fraction(-1, 1))
        {
            time += d[c.v];
            ans += time * u[c.v];
            ud[c.v] = Fraction(-1, 1);
        }
        else
        {
            int v = f.findpar(p[c.v]);
            ans -= u[v] * d[c.v];

            u[v] += u[c.v];
            d[v] += d[c.v];
            ud[v] = Fraction(u[v], d[v]);

            f.par[c.v] = v;

            q.emplace(ud[v], v);
        }
    }

    return ans;
}

void Read()
{
    int n;
    cin >> n;
    vector<int> p(n), d(n), u(n);
    for (int i = 0; i < n; ++i)
        cin >> p[i] >> u[i] >> d[i];

    cout << scheduling_cost(p, u, d);
}

void Solve()
{
}

Compilation message

job.cpp: In function 'void read(T&)':
job.cpp:12:18: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   12 |     register int c;
      |                  ^

Subtask #1
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	972 KB	Output is correct
2	Correct	1 ms	972 KB	Output is correct
3	Incorrect	1 ms	972 KB	Output isn't correct
4	Halted	0 ms	0 KB	-

Subtask #2
7.0 / 7.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	972 KB	Output is correct
2	Correct	1 ms	1084 KB	Output is correct
3	Correct	1 ms	972 KB	Output is correct
4	Correct	155 ms	16948 KB	Output is correct
5	Correct	128 ms	16908 KB	Output is correct
6	Correct	150 ms	16952 KB	Output is correct
7	Correct	171 ms	16936 KB	Output is correct
8	Correct	134 ms	16908 KB	Output is correct
9	Correct	141 ms	16856 KB	Output is correct
10	Correct	136 ms	16884 KB	Output is correct
11	Correct	156 ms	16936 KB	Output is correct

Subtask #3
12.0 / 12.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	972 KB	Output is correct
2	Correct	1 ms	972 KB	Output is correct
3	Correct	1 ms	972 KB	Output is correct
4	Correct	2 ms	1100 KB	Output is correct
5	Correct	10 ms	2064 KB	Output is correct
6	Correct	161 ms	17344 KB	Output is correct
7	Correct	164 ms	17220 KB	Output is correct
8	Correct	142 ms	17192 KB	Output is correct
9	Correct	142 ms	17208 KB	Output is correct
10	Correct	1 ms	972 KB	Output is correct
11	Correct	2 ms	1228 KB	Output is correct
12	Correct	6 ms	1928 KB	Output is correct
13	Correct	7 ms	2064 KB	Output is correct
14	Correct	143 ms	17208 KB	Output is correct
15	Correct	153 ms	17196 KB	Output is correct
16	Correct	139 ms	17216 KB	Output is correct
17	Correct	142 ms	17188 KB	Output is correct
18	Correct	144 ms	17336 KB	Output is correct
19	Correct	164 ms	17188 KB	Output is correct
20	Correct	150 ms	17196 KB	Output is correct
21	Correct	145 ms	17188 KB	Output is correct
22	Correct	158 ms	17336 KB	Output is correct
23	Correct	154 ms	17188 KB	Output is correct
24	Correct	145 ms	17188 KB	Output is correct