oj.uz

답안 #867437

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
867437 2023-10-28T11:49:36 Z sleepntsheep 바이오칩 (IZhO12_biochips) C++17
80 / 100
 2000 ms 256840 KB 
#include <iostream>
#include <vector>
#include <algorithm>
#include <deque>
#include <set>
#include <utility>
#include <array>

using namespace std;
#define ALL(x) x.begin(), x.end()
#define ShinLena cin.tie(nullptr)->sync_with_stdio(false);
#define N 200050
using ll = long long;

int n, m, p[N], a[N], in[N], out[N], timer, dp[502][N];
vector<int> g[N];
vector<tuple<int, int, int>> v;

void dfs(int u)
{
    in[u] = timer++;
    for (auto v : g[u]) dfs(v);
    out[u] = timer++;
    v.emplace_back(out[u], in[u], a[u]);
}

void schedule()
{
    for (int j = 1; j <= m; ++j)
    {
        for (auto i = 0; i < v.size(); ++i)
        {
            auto [e, s, w] = v[i];
            int l = 0, r = i-1;
            dp[j][i] = i?dp[j][i-1]:w;
            while (l <= r)
            {
                int y = (l+r)/2;
                if (get<0>(v[y]) < s)
                    dp[j][i] = max(dp[j][i], dp[j-1][y] + w), l = y + 1;
                else r = y - 1;
            }
        }
    }
}

int main()
{
    ShinLena;
    cin >> n >> m;
    for (int i = 1; i <= n; ++i) cin >> p[i] >> a[i], g[p[i]].push_back(i);
    dfs(0);
    sort(ALL(v));
    schedule();
    cout << dp[m][v.size()-1];
    return 0;
}

Compilation message

biochips.cpp: In function 'void schedule()':
biochips.cpp:31:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::tuple<int, int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |         for (auto i = 0; i < v.size(); ++i)
      |                          ~~^~~~~~~~~~

Subtask #1
80.0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 10844 KB Output is correct
2 Correct 1 ms 8796 KB Output is correct
3 Correct 4 ms 23180 KB Output is correct
4 Correct 22 ms 56348 KB Output is correct
5 Correct 28 ms 66764 KB Output is correct
6 Correct 35 ms 85008 KB Output is correct
7 Correct 1914 ms 249192 KB Output is correct
8 Correct 1826 ms 248748 KB Output is correct
9 Execution timed out 2013 ms 256840 KB Time limit exceeded
10 Execution timed out 2065 ms 248888 KB Time limit exceeded