제출 #1127471

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1127471		cpismayilmmdv985	Paprike (COI18_paprike)	C++20	13 / 100	43 ms	17224 KiB

paprike

#include <bits/stdc++.h>

using namespace std;

template<typename T1, typename T2>ostream& operator<<(ostream &os, const pair<T1, T2> &p) {return os << '{' << p.first << ", " << p.second << '}';}
template<typename T_container, typename T = typename enable_if<!is_same<T_container, string>::value, typename T_container::value_type>::type> ostream& operator<<(ostream &os, const T_container &v) { os << '{'; string sep; for (const T &x : v) os << sep << x, sep = ", "; return os << '}'; }
template <typename K, typename V> ostream& operator<<(ostream& os, const map<K, V>& m) {os << "{";for (auto it = m.begin(); it != m.end(); ++it) {if (it != m.begin()) os << ", "; os << it->first << " : " << it->second;}return os << "}";}
void debug() { cerr << endl; }
template<typename Head, typename... Tail>
void debug(Head H, Tail... T) { cerr << H; debug(T...); }
#ifdef ONPC
#define deb(...) cerr << '[' << __FILE__ << ':' << __LINE__ << "] (" << #__VA_ARGS__ << "):", debug(__VA_ARGS__)
#else
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#define deb(...)
#endif

const int mxN = 2e5 + 5;
const int mod = 1e9 + 7;
const int dx4[] = {1, -1, 0, 0}, dy4[] = {0, 0, -1, 1};
const int dx8[] = {1, -1, 0, 0, 1, -1, 1, -1}, dy8[] = {0, 0, -1, 1, 1, -1, -1, 1};

int arr[mxN], par[mxN], cost[mxN], n, k, cnt = 0;
vector<int> g[mxN];
bool vis[mxN];

void dfs(int u) {
    cost[u] += arr[u];
    vis[u] = true;
    int mn = INT_MAX, node = -1;
    for (auto &v : g[u]) {
        if (vis[v]) continue;
        if (arr[v] + cost[u] <= k) {
            par[v] = u;
            cost[v] = cost[u];
            dfs(v);
        } else {
            cnt++;
            dfs(v);
        }
    }
    cost[par[u]] = cost[u];
}

void run_case() {
    cin >> n >> k;
    for (int i = 1; i <= n; i++)    cin >> arr[i], par[i] = i;
    for (int i = 1, u, v; i < n; i++) {
        cin >> u >> v;
        g[u].push_back(v);
        g[v].push_back(u);
    }        
    // cout << "<<<<<<Output>>>>>>\n";
    dfs(1);
    cout << cnt << "\n";
    // cout << "Cost array: ";
    // for (int i = 1; i <= n; i++)
    //     cout << cost[i] << " ";
    // cout << "\n";
    // cout << "Visited array: ";
    // for (int i = 1; i <= n; i++)
    //     cout << vis[i] << " ";
    return;
}

int main() {
    cin.tie(nullptr)->sync_with_stdio(false);
    int test_case = 1;
    // cin >> test_case;
    for (int num_case = 1; num_case <= test_case; num_case++) {
        run_case();
    }
    return 0;
}

• Subtask 1: 0 / 11
• Subtask 2: 13 / 13
• Subtask 3: 0 / 27
• Subtask 4: 0 / 49