제출 #1338980

#제출 시각아이디문제언어결과실행 시간메모리
1338980vahagng다리 (APIO19_bridges)C++20
0 / 100
3094 ms589824 KiB
//----------vahagng----------//
#define _CRT_SECURE_NO_WARNINGS
#include <bits/stdc++.h>
// #include <ext/pb_ds/assoc_container.hpp>
using namespace std;
// using namespace __gnu_pbds;

// template <class T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

#ifndef ONLINE_JUDGE
#define dbg(x) cerr << #x <<" "; print(x); cerr << endl;
#else
#define dbg(x)
#endif

void print(long long t) { cerr << t; }
void print(int t) { cerr << t; }
void print(string t) { cerr << t; }
void print(char t) { cerr << t; }
void print(double t) { cerr << t; }
void print(long double t) { cerr << t; }
void print(unsigned long long t) { cerr << t; }

template <class T, class V> void print(pair <T, V> p);
template <class T> void print(vector <T> v);
template <class T> void print(set <T> v);
template <class T, class V> void print(map <T, V> v);
template <class T> void print(multiset <T> v);
template <class T, class V> void print(T v[], V n) { cerr << "["; for (int i = 0; i < n; i++) { cerr << v[i] << " "; } cerr << "]"; }
template <class T, class V> void print(pair <T, V> p) { cerr << "{"; print(p.first); cerr << ","; print(p.second); cerr << "}"; }
template <class T> void print(vector <T> v) { cerr << "[ "; for (T i : v) { print(i); cerr << " "; } cerr << "]"; }
template <class T> void print(set <T> v) { cerr << "[ "; for (T i : v) { print(i); cerr << " "; } cerr << "]"; }
template <class T> void print(multiset <T> v) { cerr << "[ "; for (T i : v) { print(i); cerr << " "; } cerr << "]"; }
template <class T, class V> void print(map <T, V> v) { cerr << "[ "; for (auto i : v) { print(i); cerr << " "; } cerr << "]"; }

#define ll long long
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()
#define ld long double
#define sz(v) v.size()
#define endl '\n'

const ll inf = 2e18, mod = 1e9 + 7, mod2 = 998244353;

void SetIO(string str = "") {
    if (str != "") {
        freopen((str + ".in").c_str(), "r", stdin);
        freopen((str + ".out").c_str(), "w", stdout);
    }
    else {
        freopen("input.txt", "r", stdin);
        freopen("output.txt", "w", stdout);
    }
}

void FastIO() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
}

const int N = 3e5 + 10, M = 1e7 + 10;

mt19937 rnd(chrono::system_clock::now().time_since_epoch().count());

ll binpow(ll a, ll b) {
    ll res = 1;
    while (b) {
        if (b & 1) {
            res = (res * a) % mod;
        }
        b >>= 1;
        a = (a * a) % mod;
    }
    return res;
}

ll n, m, q, sz[N], par[N], mn[N], tin[N], tout[N], timer;
vector<pair<int, ll>> adj[N];

void dfs0(int node) {
    mn[node] = inf;
    sz[node] = 1;
    tin[node] = ++timer;
    for (auto [u, w] : adj[node]) {
        dfs0(u);
        sz[node] += sz[u];
        mn[node] = min(mn[node], mn[u]);
    }
    for (auto [u, w] : adj[node]) {
        mn[node] = min(mn[node], w);
    }
    tout[node] = timer;
}

bool herna(int u, int v) {
    return tin[u] <= tin[v] && tout[u] >= tout[v];
}

void upd(int node, int v, ll w, int x) {
    if (x == node) {
        for (auto& [u, W] : adj[node]) {
            if (u == v) {
                W = w;
                break;
            }
        }
        mn[node] = inf;
        for (auto [u, W] : adj[node]) {
            mn[node] = min(mn[node], mn[u]);
        }
        for (auto [u, W] : adj[node]) {
            mn[node] = min(mn[node], W);
        }
        return;
    }
    assert(adj[x].size() > 0);
    int L = adj[x][0].first, R = adj[x][1].first;
    if (herna(L, node)) {
        upd(node, v, w, L);
    }
    else {
        upd(node, v, w, R);
    }
    mn[x] = inf;
    for (auto [u, W] : adj[x]) {
        mn[x] = min(mn[x], mn[u]);
    }
    for (auto [u, W] : adj[x]) {
        mn[x] = min(mn[x], W);
    }
}


ll qry(int node, ll w, int x) {
    if (mn[x] >= w) {
        return sz[x];
    }
    if (herna(node, x)) {
        ll ans = 0;
        for (auto [u, W] : adj[x]) {
            if (W >= w) {
                ans += qry(node, w, u);
            }
        }
        return ans;
    }
    assert(adj[x].size() > 0);
    int L = adj[x][0].first, R = adj[x][1].first;
    if (herna(L, node)) {
        return qry(node, w, L);
    }
    else {
        return qry(node, w, R);
    }
    return -1;
}

void solve(int tc) {
    cin >> n >> m;
    for (int i = 1; i <= m; i++) {
        int u, v;
        ll w;
        cin >> u >> v >> w;
        adj[u].push_back({ v, w });
        par[v] = u;
    }
    dfs0(1);
    cin >> q;
    while (q--) {
        int type;
        cin >> type;
        if (type == 1) {
            int i;
            ll w;
            cin >> i >> w;
            int u = (i + 1) / 2;
            int v = i + 1;
            upd(u, v, w, 1);
        }
        else {
            int node;
            ll w;
            cin >> node >> w;
            cout << qry(node, w, 1) << endl;
        }
    }
}

void precalc() {
}

int main() {
    // SetIO("teamwork");
    FastIO();
    int test_case = 1;
    // cin >> test_case;
    precalc();
    int cnt = 1;
    while (test_case--) {
        solve(cnt++);
    }
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

bridges.cpp: In function 'void SetIO(std::string)':
bridges.cpp:47:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   47 |         freopen((str + ".in").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
bridges.cpp:48:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   48 |         freopen((str + ".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
bridges.cpp:51:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   51 |         freopen("input.txt", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
bridges.cpp:52:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   52 |         freopen("output.txt", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
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