제출 #1340386

#제출 시각아이디문제언어결과실행 시간메모리
1340386vjudge1원숭이와 사과 나무 (IZhO12_apple)C++20
100 / 100
212 ms137424 KiB
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;
template<typename T>
using orderedset = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
#define int long long
#define ll long long
#define ld long double
#define endl '\n'
#define wady                      \
    ios_base::sync_with_stdio(0); \
    cin.tie(0);                   \
    cout.tie(0);

void files() {
#ifndef ONLINE_JUDGE
    freopen("in.txt", "r", stdin);
    freopen("out.txt", "w", stdout);
#endif
}

struct implicitsegtree {
    struct Node {
        int freq = 0;
        int lazy = 0;
        int left = -1;
        int right = -1;
    };

    vector<Node> tree;
    const int n;
    int timer = 0;

    int merge(int a, int b) { return a + b; }

    void apply(int cur, int len, int val) {
        if (val == 1) {
            tree[cur].lazy = val;
            tree[cur].freq = len * val;
        }
    }

    void push_down(int cur, int l, int r) {
        if (tree[cur].left == -1) {
            tree[cur].left = ++timer;
            tree.push_back(Node());
        }
        if (tree[cur].right == -1) {
            tree[cur].right = ++timer;
            tree.push_back(Node());
        }
        int m = (l + r) / 2;
        apply(tree[cur].left, m - l + 1, tree[cur].lazy);
        apply(tree[cur].right, r - m, tree[cur].lazy);
        tree[cur].lazy = 0;
    }

    void update(int cur, int l, int r, int ql, int qr, int val) {
        if (qr < l || ql > r) { return; }
        if (ql <= l && r <= qr) {
            apply(cur, r - l + 1, val);
        } else {
            push_down(cur, l, r);
            int m = (l + r) / 2;
            update(tree[cur].left, l, m, ql, qr, val);
            update(tree[cur].right, m + 1, r, ql, qr, val);
            tree[cur].freq =
                    merge(tree[tree[cur].left].freq, tree[tree[cur].right].freq);
        }
    }

    int query(int cur, int l, int r, int ql, int qr) {
        if (qr < l || ql > r) { return 0; }
        if (ql <= l && r <= qr) { return tree[cur].freq; }
        push_down(cur, l, r);
        int m = (l + r) / 2;
        return merge(query(tree[cur].left, l, m, ql, qr),
                    query(tree[cur].right, m + 1, r, ql, qr));
    }

    implicitsegtree(int n, int q = 0) : n(n) {
        if (q > 0) { tree.reserve(2 * q * __lg(n)); }
        tree.push_back(Node());
    }

    void update(int ql, int qr, int val) { update(0, 0, n - 1, ql, qr, val); }

    int query(int ql, int qr) { return query(0, 0, n - 1, ql, qr); }
};

void solve(int tc) {
    int q;
    cin >> q;
    implicitsegtree tr((int) 1e9 + 2, q);
    int prv = 0;
    while (q--) {
        int t, l, r;
        cin >> t >> l >> r;
        if (t == 1) {
            int ans = tr.query(l + prv, r + prv);
            cout << ans << endl;
            prv = ans;
        } else {
            tr.update(l + prv, r + prv, 1);
        }
    }
}


signed main() {
    wady
    
    int t = 1;
    int tc = 1;
    while (t--)
        solve(tc++);
}

컴파일 시 표준 에러 (stderr) 메시지

apple.cpp: In function 'void files()':
apple.cpp:20:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |     freopen("in.txt", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
apple.cpp:21:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |     freopen("out.txt", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
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