Submission #1096199

#TimeUsernameProblemLanguageResultExecution timeMemory
1096199stdfloatHedgehog Daniyar and Algorithms (IZhO19_sortbooks)C++17
64 / 100
2779 ms262148 KiB
    #include <bits/stdc++.h>
    using namespace std;
     
    using ll = long long;
     
    #define sz(v)  (int)(v).size()
    #define all(v) (v).begin(), v.end()
     
    int mx;
     
    vector<int> a, st, vis;
     
    vector<vector<int>> v;
     
    void bld(int nd, int l, int r) {
    	if (l == r) {
    		vis[nd] = 0; st[nd] = a[l]; v[nd] = {a[l]};
    		return;
    	}
     
    	int ch = (nd << 1) + 1, md = l + r >> 1;
    	bld(ch, l, md); bld(ch + 1, md + 1, r);
     
    	st[nd] = max(st[ch], st[ch + 1]);
     
    	v[nd].assign(sz(v[ch]) + sz(v[ch + 1]), 0);
    	merge(all(v[ch]), all(v[ch + 1]), v[nd].begin());
    	
    	int mx = 0;
    	for (int i = l; i <= r; i++) {
    		if (mx > a[i]) vis[nd] = max(vis[nd], mx + a[i]);
    		else mx = a[i];
    	}
    }
     
    bool fnd(int nd, int l, int r, int x, int y, int k) {
    	if (r < x || y < l) return true;
     
    	if (x <= l && r <= y) {
    		bool tr = (max(vis[nd], (mx > v[nd][0] ? mx + *--lower_bound(all(v[nd]), mx) : 0)) <= k);
    		mx = max(mx, st[nd]);
    		return tr;
    	}
     
    	int ch = (nd << 1) + 1, md = l + r >> 1;
    	return (!fnd(ch, l, md, x, y, k) || !fnd(ch + 1, md + 1, r, x, y, k) ? false : true);
    }
     
    int main() {
    	ios::sync_with_stdio(false); cin.tie(nullptr);
     
    	int n, q;
    	cin >> n >> q;
     
    	a.assign(n, 0);
    	for (auto &i : a)
    		cin >> i;
     
    	v.assign(n << 2, {});
    	st = vis = vector<int>(n << 2);
    	bld(0, 0, n - 1);
     
    	while (q--) {
    		int l, r, k;
    		cin >> l >> r >> k; l--; r--;
     
    		mx = 0;
    		cout << fnd(0, 0, n - 1, l, r, k) << endl;
    	}
    }

Compilation message (stderr)

sortbooks.cpp: In function 'void bld(int, int, int)':
sortbooks.cpp:21:37: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   21 |      int ch = (nd << 1) + 1, md = l + r >> 1;
      |                                   ~~^~~
sortbooks.cpp: In function 'bool fnd(int, int, int, int, int, int)':
sortbooks.cpp:45:37: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   45 |      int ch = (nd << 1) + 1, md = l + r >> 1;
      |                                   ~~^~~
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