제출 #667217

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
667217		haxorman	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++14	0 / 100	1651 ms	51888 KiB

sortbooks

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

const int mxN = 1e6 + 7;
const int SZ = exp2(ceil(log2(mxN)));

int seg[2 * SZ];

void update(int pos, int val) {
    seg[pos + SZ] = val;

    for (pos /= 2; pos; pos /= 2) {
        seg[pos] = max(seg[2 * pos], seg[2 * pos + 1]);
    }
}

int query(int a, int b, int ind = 1, int l = 0, int r = SZ - 1) {
    if (r < a || l > b) {
        return 0;
    }

    if (a <= l && r <= b) {
        return seg[ind];
    }

    int mid = (l + r) / 2;
    return max(query(a, b, 2 * ind, l, mid),
               query(a, b, 2 * ind + 1, mid + 1, r));
}

struct Inv {
    int l, r;

    bool operator<(Inv x) {
        if (l == x.l) {
            if (r - l + 1 == x.r - x.l + 1) {
                return r < x.r;
            }
            return r - l + 1 < x.r - x.l + 1;
        }
        return l < x.l;
    }
};

int arr[mxN];
  
int32_t main() {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	
    int n, q;
    cin >> n >> q;
    

    vector<int> st;
    vector<Inv> invs;
    for (int i = 0; i < n; ++i) {
        cin >> arr[i];
        
        while (st.size() && arr[i] > arr[st.back()]) {
            st.pop_back();
        }
        
        if (st.size()) {
            Inv inv;
            inv.l = st.back();
            inv.r = i;
            
            invs.push_back(inv);
        }
        st.push_back(i);
    }

    sort(invs.begin(), invs.end());
    for (int i = 0; i < invs.size(); ++i) {
        update(i, arr[invs[i].l] + arr[invs[i].r]);
    }

    while (q--) {
        int l, r, k;
        cin >> l >> r >> k;

        int lb = 0, rb = invs.size() - 1, indl = -1;
        while (lb <= rb) {
            int mb = (lb + rb) / 2;
            
            if (invs[mb].l < l) {
                lb = mb + 1;
            }
            else if (invs[mb].l > r || invs[mb].r > r) {
                rb = mb - 1;
            }
            else {
                indl = mb;
                rb = mb - 1;
            }
        }

        if (indl == -1) {
            cout << "0\n";
            continue;
        }

        lb = 0, rb = invs.size() - 1;
        int indr = indl;
        while (lb <= rb) {
            int mb = (lb + rb) / 2;

            if (invs[mb].l < l) {
                lb = mb + 1;
            }
            else if (invs[mb].l > r || invs[mb].r > r) {
                rb = mb - 1;
            }
            else {
                indr = mb;
                lb = mb + 1;
            }
        }

        cout << (query(indl, indr) <= k ? 1 : 0) << "\n";
    }
}

컴파일 시 표준 에러 (stderr) 메시지

sortbooks.cpp: In function 'int32_t main()':
sortbooks.cpp:74:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Inv>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   74 |     for (int i = 0; i < invs.size(); ++i) {
      |                     ~~^~~~~~~~~~~~~

• Subtask 1: 0 / 8
• Subtask 2: 0 / 9
• Subtask 3: 0 / 13
• Subtask 4: 0 / 17
• Subtask 5: 0 / 30
• Subtask 6: 0 / 23