Submission #1034030

#	Time	Username	Problem	Language	Result	Execution time	Memory
1034030		dilanyan	Inside information (BOI21_servers)	C++17	0 / 100	21 ms	13404 KiB

servers

//-------------dilanyan------------\\ 
 
#define _CRT_SECURE_NO_WARNINGS
#include<bits/stdc++.h>
#include<stdio.h>
using namespace std;
 
//------------------Kargpefines--------------------\\ 
 
#define ll long long
#define pb push_back
#define all(u) (u).begin(), (u).end()
#define pqueue priority_queue
#define upper upper_bound
#define lower lower_bound
#define umap unordered_map
#define uset unordered_set

void KarginSet(string name = "") {
    ios_base::sync_with_stdio(false); cin.tie(NULL);
    if (name.size()) {
        freopen((name + ".in").c_str(), "r", stdin);
        freopen((name + ".out").c_str(), "w", stdout);
    }
}
 
//-------------------KarginConstants------------------\\ 
 
const ll mod = 998244353;
const ll inf = 1e9;
 
//-------------------KarginCode-----------------------\\ 
 
const int N = 500005, M = 1000005;

int n, q;

vector<pair<int, int>> g[N];

bool dfs_q(int u, int p, int cur, int t) {
    if (u == t) return true;
    for (auto it : g[u]) {
        int v = it.first, ind = it.second;
        if (v == p) continue;
        if (cur > ind) continue;
        if (dfs_q(v, u, ind, t)) return true;
    }
    return false;
}

int dfs_c(int u, int p,int cur) {
    int res = 1;
    for (auto it : g[u]) {
        int v = it.first, ind = it.second;
        if (v == p) continue;
        if (cur > ind) continue;
        res += dfs_c(v, u, ind);
    }
    return res;
}

int tree[4 * N];

struct segtree {

    int size = 1;

    void init() {
        while (size < n) size <<= 1;
    }

    void push(int x, int lx, int rx) {
        if (rx - lx == 1) return;
        tree[2 * x + 1] += tree[x], tree[2 * x + 2] += tree[x];
        tree[x] = 0;
    }

    void set(int l, int r, int x, int lx, int rx) {
        push(x, lx, rx);
        if (lx >= r || rx <= l) return;
        if (lx >= l && rx <= r) {
            tree[x]++;
            return;
        }
        int m = (lx + rx) / 2;
        set(l, r, 2 * x + 1, lx, m);
        set(l, r, 2 * x + 2, m, rx);
    }

    void set(int l, int r) {
        set(l, r, 0, 0, size);
    }

    int get(int i, int x, int lx, int rx) {
        push(x, lx, rx);
        if (rx - lx == 1) return tree[x];
        int m = (lx + rx) / 2;
        if (i < m) return get(i, 2 * x + 1, lx, m);
        return get(i, 2 * x + 2, m, rx);
    }

    int get(int i) {
        return get(i, 0, 0, size);
    }
};

void KarginSolve() {
    cin >> n >> q;
    vector<int> ind(n + 1, inf);
    ind[1] = 0;
    int l = 1;
    segtree st;
    st.init();
    st.set(0, 1);
    for (int i = 1;i <= n - 1 + q;i++) {
        char type; cin >> type;
        if (type == 'S') {
            int u, v;
            cin >> u >> v;
            if (u == 1) swap(u, v);
            ind[u] = l++;
            st.set(0, ind[u] + 1);
            st.set(ind[u], ind[u] + 1);
        }
        else if (type == 'Q') {
            int u, v;
            cin >> u >> v;
            if (u == 1 || v == 1) cout << "yes\n";
            else {
                if (ind[u] == inf || ind[v] == inf) cout << "no\n";
                else if (ind[u] >= ind[v]) cout << "yes\n";
                else cout << "no\n";
            }
        }
        else {
            int u; cin >> u;
            cout << st.get(ind[u]) << '\n';
        }
    }
}

int main() {
    KarginSet();
    int test = 1;
    //cin >> test; 
    while (test--) {
        KarginSolve();
    }
    return 0;
} 

Compilation message (stderr)

servers.cpp:1:1: warning: multi-line comment [-Wcomment]
    1 | //-------------dilanyan------------\\
      | ^
servers.cpp:8:1: warning: multi-line comment [-Wcomment]
    8 | //------------------Kargpefines--------------------\\
      | ^
servers.cpp:27:1: warning: multi-line comment [-Wcomment]
   27 | //-------------------KarginConstants------------------\\
      | ^
servers.cpp:32:1: warning: multi-line comment [-Wcomment]
   32 | //-------------------KarginCode-----------------------\\
      | ^
servers.cpp: In function 'void KarginSet(std::string)':
servers.cpp:22:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |         freopen((name + ".in").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
servers.cpp:23:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |         freopen((name + ".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 2.5
• Subtask 2: 0 / 2.5
• Subtask 3: 0 / 2.5
• Subtask 4: 0 / 2.5
• Subtask 5: 0 / 5
• Subtask 6: 0 / 5
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 12.5
• Subtask 10: 0 / 12.5
• Subtask 11: 0 / 17.5
• Subtask 12: 0 / 17.5