Submission #860040

#	Time	Username	Problem	Language	Result	Execution time	Memory
860040		Alfraganus	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++17	Compilation error	0 ms	0 KiB

sortbooks

#include <iostream>
#include <vector>
using namespace std;
struct tree_type{
    int s;
    vector<pair<int, int> >arr;
};
vector<tree_type> tree;

vector<int> a;
const int inf = INT_MAX;
void build(int v, int l, int r){
    if(l == r){
        tree[v].s = -1;
        tree[v].arr.push_back({a[l-1], l});
    }
    else{
        int m = (l + r) >> 1;
        build(v<<1, l, m);
        build(v<<1|1, m+1, r);
        tree[v] = tree[v<<1];
        tree[v].s = max(tree[v].s, tree[v<<1|1].s);
        
        int mx = inf;
        
        int i = 0;
        while(i < tree[v<<1|1].arr.size() && tree[v<<1|1].arr[i] < tree[v].arr.back())
            mx = tree[v<<1|1].arr[i ++].first;
        
        if(mx != inf)
            tree[v].s = max(tree[v].arr.back().first + mx, tree[v].s);
        while(i < tree[v<<1|1].arr.size())
            tree[v].arr.push_back(tree[v<<1|1].arr[i++]);
    }
}
int get(int v, int l, int r, int L, int R, int k){
    if(L == l && r == R){
        if(tree[v].s > k) throw 1;
        return tree[v].arr.back().first;
    }
    int m = (l + r) >> 1;
    if(R <= m) return get(v<<1, l, m, L, R, k);
    else if(m < L) return get(v<<1|1, m+1, r, L, R, k);
    else{
        int left = get(v<<1, l, m, L, m, k);
        int right = get(v<<1|1, m+1, r, m+1, R, k);
        if(left * 2 > k){
            auto id = upper_bound(tree[v<<1|1].arr.begin(), tree[v<<1|1].arr.end(), make_pair(k - left, inf));
            if(id != tree[v<<1|1].arr.end() && id->second <= R && left > id->first)
                throw 1;
        }
        return max(left, right);
    }
}
int main(){
    cin.tie(nullptr)->sync_with_stdio(false);
    int n, q;
    cin >> n >> q;
    a.resize(n);
    tree.resize(n<<2);
    for(int &x:a) cin >> x;
    build(1,1,n);
    for(int i = 0, l, r, k; i < q; i ++){
        cin >> l >> r >> k;
        try{
            int x = get(1,1,n,l,r,k);
            cout << "1\n";
        }
        catch(int x){
            cout << "0\n";
        }
    }
    return 0;
}

Compilation message (stderr)

sortbooks.cpp:11:17: error: 'INT_MAX' was not declared in this scope
   11 | const int inf = INT_MAX;
      |                 ^~~~~~~
sortbooks.cpp:3:1: note: 'INT_MAX' is defined in header '<climits>'; did you forget to '#include <climits>'?
    2 | #include <vector>
  +++ |+#include <climits>
    3 | using namespace std;
sortbooks.cpp: In function 'void build(int, int, int)':
sortbooks.cpp:27:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |         while(i < tree[v<<1|1].arr.size() && tree[v<<1|1].arr[i] < tree[v].arr.back())
      |               ~~^~~~~~~~~~~~~~~~~~~~~~~~~
sortbooks.cpp:32:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |         while(i < tree[v<<1|1].arr.size())
      |               ~~^~~~~~~~~~~~~~~~~~~~~~~~~
sortbooks.cpp: In function 'int get(int, int, int, int, int, int)':
sortbooks.cpp:48:23: error: 'upper_bound' was not declared in this scope
   48 |             auto id = upper_bound(tree[v<<1|1].arr.begin(), tree[v<<1|1].arr.end(), make_pair(k - left, inf));
      |                       ^~~~~~~~~~~
sortbooks.cpp: In function 'int main()':
sortbooks.cpp:66:17: warning: unused variable 'x' [-Wunused-variable]
   66 |             int x = get(1,1,n,l,r,k);
      |                 ^