제출 #1124306

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1124306		sunflower	원숭이와 사과 나무 (IZhO12_apple)	C++20	100 / 100	340 ms	137384 KiB

apple

#include <bits/stdc++.h>
using namespace std;

#define left __left
#define right __right

const int inf = (int) 1e9 + 7;

struct node {
    int sum = 0;
    int lazy = 0;
    node *left = nullptr;
    node *right = nullptr;
};

typedef node* Node;

Node root = new node;

void down(Node cur, int l, int r) {
//    if (l >= r || cur->lazy == 0) return;
    if (cur->left == nullptr) cur->left = new node;
    if (cur->right == nullptr) cur->right = new node;

    if (cur->lazy > 0 && l < r) {
        int g = (l + r) >> 1;
        cur->left->sum = g - l + 1;
        cur->right->sum = r - g;
        cur->left->lazy = 1;
        cur->right->lazy = 1;
    }
    cur->lazy = 0;
    return;
}

void update(Node cur, int l, int r, int u, int v) {
    if (l > v || u > r) return;
    if (u <= l && r <= v) {
        cur->sum = r - l + 1;
        cur->lazy = 1;
        return;
    }
    down(cur, l, r);
    int g = (l + r) >> 1;
//    if (cur->left == nullptr) cur->left = new node;
//    if (cur->right == nullptr) cur->right = new node;

    update(cur->left, l, g, u, v);
    update(cur->right, g + 1, r, u, v);
    cur->sum = cur->left->sum + cur->right->sum;
}

int get(Node cur, int l, int r, int u, int v) {
    if (l > v || u > r) return 0;
    if (u <= l && r <= v) return cur->sum;
    down(cur, l, r);
    int g = (l + r) >> 1;
    return get(cur->left, l, g, u, v) + get(cur->right, g + 1, r, u, v);
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
    if (fopen("test.inp","r")) {
        freopen("test.inp","r",stdin);
        freopen("test.out","w",stdout);
    }

    int n;
    cin >> n;
    int preAns = 0;
    while (n--) {
        int type, l, r;
        cin >> type >> l >> r;
        l += preAns;
        r += preAns;
        if (type == 2) {
            update(root, 1, inf, l, r);
        } else {
            cout << (preAns = get(root, 1, inf, l, r)) << "\n";
        }
    }

    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

apple.cpp: In function 'int main()':
apple.cpp:65:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   65 |         freopen("test.inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
apple.cpp:66:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   66 |         freopen("test.out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 100 / 100