Submission #532524

#	Time	Username	Problem	Language	Result	Execution time	Memory
532524		syl123456	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++17	100 / 100	942 ms	90944 KiB

sortbooks

#include <bits/stdc++.h>
#define all(i) (i).begin(), (i).end()
using namespace std;
void Debug(bool _split) {}
template<typename T1, typename ...T2>
void Debug(bool _split, T1 i, T2 ...j) {
    if (_split)
        cerr << ", ";
    cerr << i;
    Debug(true, j...);
}
#define debug(args...) cerr << "Line(" << __LINE__ << ") : [" << #args << "] is [", Debug(false, args), cerr << "]" << endl
template<typename T1, typename T2>
ostream& operator << (ostream& i, pair<T1, T2> j) {
    return i << '(' << j.first << ", " << j.second << ')';
}
 
typedef long long ll;
typedef pair<int, int> pi;
const int inf = 0x3f3f3f3f, lg = 20;
const ll mod = 1e9 + 7, INF = 0x3f3f3f3f3f3f3f3f;
 
signed main() {
    ios::sync_with_stdio(0), cin.tie(0);
    int n, m;
    cin >> n >> m;
    int a[n];
    for (int &i : a)
        cin >> i;
    vector<int> qry[n];
    int l[m], k[m], ans[m];
    for (int i = 0, x; i < m; ++i)
        cin >> l[i] >> x >> k[i], --l[i], qry[--x].push_back(i);
    vector<int> stk;
    int bit[n + 1]{};
    auto modify = [&](int i, int d) {
        i = n - 1 - i;
        for (++i; i <= n; i += i & -i)
            bit[i] = max(bit[i], d);
    };
    auto query = [&](int i) {
        i = n - 1 - i;
        int res = 0;
        for (++i; i; i -= i & -i)
            res = max(res, bit[i]);
        return res;
    };
    for (int i = 0; i < n; ++i) {
        while (!stk.empty() && a[stk.back()] <= a[i]) {
            if (stk.size() > 1) {
                int x = stk[stk.size() - 2], y = stk.back();
                modify(x, a[x] + a[y]);
            }
            stk.pop_back();
        }
        stk.push_back(i);
        for (int j : qry[i]) {
            int x = lower_bound(all(stk), l[j]) - stk.begin();
            int tmp = x >= stk.size() - 1 ? 0 : a[stk[x]] + a[stk[x + 1]];
            tmp = max(tmp, query(l[j]));
            if (tmp <= k[j])
                ans[j] = 1;
            else
                ans[j] = 0;
        }
    }
    for (int i : ans)
        cout << i << '\n';
}

Compilation message (stderr)

sortbooks.cpp: In function 'int main()':
sortbooks.cpp:59:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   59 |             int tmp = x >= stk.size() - 1 ? 0 : a[stk[x]] + a[stk[x + 1]];
      |                       ~~^~~~~~~~~~~~~~~~~

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