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Submission #90350

# Submission time Handle Problem Language Result Execution time Memory
90350 2018-12-21T10:04:43 Z Alexa2001 Arranging Tickets (JOI17_arranging_tickets) C++17
0 / 100
 5 ms 5112 KB 
#include <bits/stdc++.h>

using namespace std;

const int Nmax = 2e5 + 5;

priority_queue<int> heap;
int start[Nmax], finish[Nmax], add[Nmax], dp[Nmax];
vector<int> v[Nmax];
int n, m, i;

bool check(int L)
{
    int i, need = 0, nr;

    for(i=1; i<=n; ++i)
    {
        start[i] = v[i].size(); add[i] = 0;
        for(auto it : v[i]) finish[it] ++;
    }

    dp[0] = L;
    for(i=1; i<n; ++i)
    {
        for(auto it : v[i]) heap.push(it);

        dp[i] = dp[i-1] + start[i] - finish[i] + add[i];

        while(dp[i] > L && need <= L)
        {
            assert(heap.size());

            dp[i] -= 2;
            nr = heap.top();
            heap.pop();
            add[nr] += 2;
            ++need;
        }

        if(need > L) return 0;
    }

    return (need <= L);
}

int main()
{
  ///  freopen("input", "r", stdin);
    cin >> n >> m;

    int i, x, y, C;
    for(i=1; i<=m; ++i)
    {
        cin >> x >> y >> C;
        if(x > y) swap(x, y);
        v[x].push_back(y);
    }

    for(i=1; i<=n; ++i) sort(v[i].begin(), v[i].end());

    int st = 0, dr = m, mid;

    while(st <= dr)
    {
        mid = (st+dr) / 2;
        if(check(mid)) dr = mid-1;
            else st = mid+1;
    }

    cout << st << '\n';
    return 0;
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 5112 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 35.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 5112 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 5112 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 5112 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 5112 KB Output isn't correct
2 Halted 0 ms 0 KB -