oj.uz

Submission #877027

# Submission time Handle Problem Language Result Execution time Memory
877027 2023-11-22T18:24:12 Z VahanAbraham Biochips (IZhO12_biochips) C++14
40 / 100
 395 ms 411608 KB 
#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <string>
#include <algorithm>
#include <cstring>
#include <cstdio>
#include <sstream>
#include <map>
#include <stack>
#include <set>
#include <queue>
#include <unordered_set>
#include <unordered_map>
#include <math.h>
#include <cmath>
#include <vector>
#include <iomanip>
#include <random>
#include <chrono>
using namespace std;

#define ll long long
#define fr first
#define sc second
#define pb push_back
#define US freopen("milkvisits.in", "r", stdin); freopen("milkvisits.out", "w", stdout);

ll gcd(ll a, ll b)
{
    if (a == 0 || b == 0) {
        return  max(a, b);
    }
    if (a <= b) {
        return gcd(a, b % a);
    }
    else {
        return gcd(a % b, b);
    }
}
ll lcm(ll a, ll b) {
    return (a / gcd(a, b)) * b;
}

const int N = 300005;
const ll oo = 1000000000000000, MOD = 1000000007;

vector<int> g[N];
int dp[N][505], n, m, weight[N];

void dfs(int u, int p) {
    for (int i = 0; i < g[u].size(); ++i) {
        int h = g[u][i];
        if (h != p) {
            dfs(h, u);
            for (int j = min(int(g[u].size()), m); j >= 1; --j) {
                for (int k = 1; k <= min(int(g[h].size()), j); ++k) {
                    dp[u][j] = max(dp[u][j], dp[h][k] + dp[u][j - k]);
                }
            }
        }
    }
    dp[u][1] = max(dp[u][1], weight[u]);
}

void solve() {
    cin >> n >> m;
    int r = 1;
    for (int i = 1; i <= n; ++i) {
        int u, w;
        cin >> u >> w;
        if (u == 0) {
            r = i;
        }
        else {
            g[i].pb(u);
            g[u].pb(i);
        }
        weight[i] = w;
    }
    dfs(r, -1);
    cout << dp[r][m] << endl;
}

int main() {
    ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
    //US
    int tt = 1;
    //cin >> tt;
    while (tt--) {
        solve();
    }
}

Compilation message

biochips.cpp: In function 'void dfs(int, int)':
biochips.cpp:51:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |     for (int i = 0; i < g[u].size(); ++i) {
      |                     ~~^~~~~~~~~~~~~

Subtask #1
40.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 10332 KB Output isn't correct
2 Correct 2 ms 10332 KB Output is correct
3 Correct 2 ms 10332 KB Output is correct
4 Incorrect 11 ms 27388 KB Output isn't correct
5 Incorrect 12 ms 29532 KB Output isn't correct
6 Incorrect 12 ms 29432 KB Output isn't correct
7 Correct 395 ms 308068 KB Output is correct
8 Correct 279 ms 308064 KB Output is correct
9 Incorrect 288 ms 373540 KB Output isn't correct
10 Incorrect 324 ms 411608 KB Output isn't correct