제출 #1124290

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1124290		sunflower	원숭이와 사과 나무 (IZhO12_apple)	C++20	0 / 100	285 ms	244648 KiB

apple

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

const int maxn = (int) 1e7 + 7;
int seg[4 * maxn + 7];
int lazy[4 * maxn + 7];

void down(int id, int l, int r) {
    if (lazy[id] && l < r) {
        int &v = lazy[id];
        int g = (l + r) >> 1;
        seg[id << 1] = g - l + 1;
        seg[id << 1 | 1] = r - g;
        lazy[id << 1] += v;
        lazy[id << 1 | 1] += v;
        v = 0;
        return;
    }
}

void update(int id, int l, int r, int u, int v) {
    if (l > v || u > r) return;
    if (u <= l && r <= v) {
        seg[id] = r - l + 1;
        lazy[id] = 1;
        return;
    }
    down(id, l, r);
    int g = (l + r) >> 1;
    update(id << 1, l, g, u, v);
    update(id << 1 | 1, g + 1, r, u, v);
    seg[id] = seg[id << 1] + seg[id << 1 | 1];
}

int get(int id, int l, int r, int u, int v) {
    if (l > v || u > r) return 0;
    if (u <= l && r <= v) return seg[id];
    down(id, l, r);
    int g = (l + r) >> 1;
    return get(id << 1, l, g, u, v) + get(id << 1 | 1, 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;
        assert(l <= maxn);
        assert(r <= maxn);
        if (type == 2) {
            update(1, 1, maxn, l, r);
        } else {

            cout << (preAns = get(1, 1, maxn, l, r)) << "\n";
        }
    }

    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

apple.cpp: In function 'int main()':
apple.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("test.inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
apple.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("test.out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 100