Submission #402453

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
402453	2021-05-11T17:29:21 Z	teehandsome	Circle selection (APIO18_circle_selection)	C++17	Compilation error	0 ms	0 KB

circle_selection

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define endl '\n'
#define INF 1e9+7
#define all(x) x.begin(),x.end()
using namespace std;
using namespace __gnu_pbds;
using ll=long long;
using pii=pair<int,int>;
using ppi=pair<int,pii>;
using oset=tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update>;

template<typename T>
void _print(vector<T> x) {cerr<<"{"; for(auto e:x) cerr<<e<<","; cerr<<"}";}
void _print(pii x) {cerr<<"{"<<x.first<<","<<x.second<<"}";}
template<typename T>
void _print(T x) {cerr<<x;}

void dbg() {cerr<<endl;}
template<typename Head,typename... Tail>
void dbg(Head H,Tail... T) {
    _print(H);
    if(sizeof...(T)) cerr<<",";
    else cerr<<"\"]";
    dbg(T...);
}
#define debug(...) cerr<<"["<<#__VA_ARGS__<<"]:[\"",dbg(__VA_ARGS__)

//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

struct dt {
    ll l,r;
    int idx;
    bool intersect(const dt &rr) {
        if(rr.l>=l and rr.l<=r) return true;
        if(rr.r>=l and rr.r<=r) return true;
        return false;
    }
};
struct cmpL {
    bool operator()(const dt &l,const dt &r) {
        if(l.l==r.l) return l.r>r.r;
        return l.l<r.l;
    }
};
struct cmpR {
    bool operator()(const dt &l,const dt &r) {
        return l.r<r.r;
    }
};

int main () {
    ios::sync_with_stdio(false); cin.tie(0);
    int n; cin>>n;
    vector<dt> a(n);
    set<dt,cmpL> sL;
    set<dt,cmpR> sR;
    for(int i=0;i<n;i++) {
        int x,y,r; cin>>x>>y>>r;
        a[i]={x-r,x+r,i};
        sL.insert(a[i]);
        sR.insert(a[i]);
    }
    sort(all(a),[&](const dt &l,const dt &r) {
            if((l.r-l.l)==(r.r-r.l)) return l.l<r.l;
            return (l.r-l.l)>(r.r-r.l);
         });
    vector<int> ans(n,-1);
    for(int i=0;i<n;i++) {
        int u=a[i].idx;
        if(ans[u]!=-1) continue;
        auto p=sL.lower_bound(a[i]);
        vector<dt> to_del;
        while(p!=sL.end()) {
            int v=p->idx;
            if(ans[v]!=-1) break;
            if(!a[i].intersect(*p)) break;
            to_del.push_back(*p);
//            sL.erase(p); sR.erase(p);
            ans[v]=u; p++;
        }
        for(auto e:to_del) sL.erase(e),sR.erase(e);

        vector<dt> to_del2;
        auto p2=sR.upper_bound(a[i]);
        if(p2!=sR.begin()) --p2;
        while(p2!=sR.begin()) {
            int v=p2->idx;
            if(ans[v]!=-1) break;
            if(!a[i].intersect(*p2)) break;
            to_del2.push_back(*p2);
//            sL.erase(p2); sR.erase(p2);
            ans[v]=u; p2--;
        }
        for(auto e:to_del2) sL.erase(e),sR.erase(e);
    }
    for(int i=0;i<n;i++) cout<<ans[i]+1<<" ";
    cout<<endl;
}

Compilation message

In file included from /usr/include/c++/10/map:60,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:81,
                 from circle_selection.cpp:1:
/usr/include/c++/10/bits/stl_tree.h: In instantiation of 'static const _Key& std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_S_key(std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_Const_Link_type) [with _Key = dt; _Val = dt; _KeyOfValue = std::_Identity<dt>; _Compare = cmpL; _Alloc = std::allocator<dt>; std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_Const_Link_type = const std::_Rb_tree_node<dt>*]':
/usr/include/c++/10/bits/stl_tree.h:2101:47:   required from 'std::pair<std::_Rb_tree_node_base*, std::_Rb_tree_node_base*> std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_M_get_insert_unique_pos(const key_type&) [with _Key = dt; _Val = dt; _KeyOfValue = std::_Identity<dt>; _Compare = cmpL; _Alloc = std::allocator<dt>; std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::key_type = dt]'
/usr/include/c++/10/bits/stl_tree.h:2154:4:   required from 'std::pair<std::_Rb_tree_iterator<_Val>, bool> std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_M_insert_unique(_Arg&&) [with _Arg = const dt&; _Key = dt; _Val = dt; _KeyOfValue = std::_Identity<dt>; _Compare = cmpL; _Alloc = std::allocator<dt>]'
/usr/include/c++/10/bits/stl_set.h:512:25:   required from 'std::pair<typename std::_Rb_tree<_Key, _Key, std::_Identity<_Tp>, _Compare, typename __gnu_cxx::__alloc_traits<_Alloc>::rebind<_Key>::other>::const_iterator, bool> std::set<_Key, _Compare, _Alloc>::insert(const value_type&) [with _Key = dt; _Compare = cmpL; _Alloc = std::allocator<dt>; typename std::_Rb_tree<_Key, _Key, std::_Identity<_Tp>, _Compare, typename __gnu_cxx::__alloc_traits<_Alloc>::rebind<_Key>::other>::const_iterator = std::_Rb_tree<dt, dt, std::_Identity<dt>, cmpL, std::allocator<dt> >::const_iterator; std::set<_Key, _Compare, _Alloc>::value_type = dt]'
circle_selection.cpp:62:23:   required from here
/usr/include/c++/10/bits/stl_tree.h:780:8: error: static assertion failed: comparison object must be invocable as const
  780 |        is_invocable_v<const _Compare&, const _Key&, const _Key&>,
      |        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/10/bits/stl_tree.h: In instantiation of 'static const _Key& std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_S_key(std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_Const_Link_type) [with _Key = dt; _Val = dt; _KeyOfValue = std::_Identity<dt>; _Compare = cmpR; _Alloc = std::allocator<dt>; std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_Const_Link_type = const std::_Rb_tree_node<dt>*]':
/usr/include/c++/10/bits/stl_tree.h:2101:47:   required from 'std::pair<std::_Rb_tree_node_base*, std::_Rb_tree_node_base*> std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_M_get_insert_unique_pos(const key_type&) [with _Key = dt; _Val = dt; _KeyOfValue = std::_Identity<dt>; _Compare = cmpR; _Alloc = std::allocator<dt>; std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::key_type = dt]'
/usr/include/c++/10/bits/stl_tree.h:2154:4:   required from 'std::pair<std::_Rb_tree_iterator<_Val>, bool> std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_M_insert_unique(_Arg&&) [with _Arg = const dt&; _Key = dt; _Val = dt; _KeyOfValue = std::_Identity<dt>; _Compare = cmpR; _Alloc = std::allocator<dt>]'
/usr/include/c++/10/bits/stl_set.h:512:25:   required from 'std::pair<typename std::_Rb_tree<_Key, _Key, std::_Identity<_Tp>, _Compare, typename __gnu_cxx::__alloc_traits<_Alloc>::rebind<_Key>::other>::const_iterator, bool> std::set<_Key, _Compare, _Alloc>::insert(const value_type&) [with _Key = dt; _Compare = cmpR; _Alloc = std::allocator<dt>; typename std::_Rb_tree<_Key, _Key, std::_Identity<_Tp>, _Compare, typename __gnu_cxx::__alloc_traits<_Alloc>::rebind<_Key>::other>::const_iterator = std::_Rb_tree<dt, dt, std::_Identity<dt>, cmpR, std::allocator<dt> >::const_iterator; std::set<_Key, _Compare, _Alloc>::value_type = dt]'
circle_selection.cpp:63:23:   required from here
/usr/include/c++/10/bits/stl_tree.h:780:8: error: static assertion failed: comparison object must be invocable as const