Submission #1313213

#	Time	Username	Problem	Language	Result	Execution time	Memory
1313213		jahongir	Circle selection (APIO18_circle_selection)	C++20	Compilation error	0 ms	0 KiB

circle_selection

#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")

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

#define pb push_back
#define all(a) a.begin(),a.end()

typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef unsigned long long ull;
typedef vector<int> vi;


bool check(const array<int,3> &a, const array<int,3> &b){
    ll dx = a[0]-b[0], dy = a[1]-b[1], r = a[2]+b[2];
    return dx*dx + dy*dy <= r*r;
}


void solve(){
    int n; cin >> n;

    vector<array<int,3>> vec(n);
    unordered_map<ll,set<int>> mp;
    int cnt = 0;
    for(auto &[x,y,r] : vec){
        cin >> x >> y >> r;
        mp[(x/r) + ((y/r)<<30)].insert(cnt++);
    }

    vector<int> ind(n);
    iota(all(ind),0);


    sort(all(ind),[&](const int &i, const int &j){
        if(vec[i][2]==vec[j][2]) return i < j;
        return vec[i][2] > vec[j][2];
    });

    vector<int> res(n,-1);
    int r = vec[ind[0]][2];

    int lim = 10;

    for(int i = 0; i < n; i++) if(res[ind[i]]==-1){
        int x = vec[ind[i]][0], y = vec[ind[i]][1];
        for(int dx = -lim; dx <= lim; dx++)
            for(int dy = -lim; dy <= lim; dy++){
                vector<int> rem;
                for(auto j : mp[(x/r+dx)+((y/r+dy)<<30)]){
                    if(check(vec[ind[i]],vec[j])){
                        rem.emplace_back(j);
                        res[j] = ind[i];
                    }
                }
                for(auto j : rem)
                    mp[{x/r+dx,y/r+dy}].erase(j);
            }
    }

    for(auto x : res) cout << x+1 << ' ';
}



signed main(){
    cin.tie(0)->sync_with_stdio(0);


    int t = 1;
    // cin >> t;
    while(t--){solve();}
}

Compilation message (stderr)

circle_selection.cpp: In function 'void solve()':
circle_selection.cpp:60:23: error: no match for 'operator[]' (operand types are 'std::unordered_map<long long int, std::set<int> >' and '<brace-enclosed initializer list>')
   60 |                     mp[{x/r+dx,y/r+dy}].erase(j);
      |                       ^
In file included from /usr/include/c++/13/unordered_map:41,
                 from /usr/include/c++/13/functional:63,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:53,
                 from circle_selection.cpp:4:
/usr/include/c++/13/bits/unordered_map.h:986:7: note: candidate: 'std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::mapped_type& std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::operator[](const key_type&) [with _Key = long long int; _Tp = std::set<int>; _Hash = std::hash<long long int>; _Pred = std::equal_to<long long int>; _Alloc = std::allocator<std::pair<const long long int, std::set<int> > >; mapped_type = std::set<int>; key_type = long long int]'
  986 |       operator[](const key_type& __k)
      |       ^~~~~~~~
/usr/include/c++/13/bits/unordered_map.h:986:34: note:   no known conversion for argument 1 from '<brace-enclosed initializer list>' to 'const std::unordered_map<long long int, std::set<int> >::key_type&' {aka 'const long long int&'}
  986 |       operator[](const key_type& __k)
      |                  ~~~~~~~~~~~~~~~~^~~
/usr/include/c++/13/bits/unordered_map.h:990:7: note: candidate: 'std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::mapped_type& std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::operator[](key_type&&) [with _Key = long long int; _Tp = std::set<int>; _Hash = std::hash<long long int>; _Pred = std::equal_to<long long int>; _Alloc = std::allocator<std::pair<const long long int, std::set<int> > >; mapped_type = std::set<int>; key_type = long long int]'
  990 |       operator[](key_type&& __k)
      |       ^~~~~~~~
/usr/include/c++/13/bits/unordered_map.h:990:29: note:   no known conversion for argument 1 from '<brace-enclosed initializer list>' to 'std::unordered_map<long long int, std::set<int> >::key_type&&' {aka 'long long int&&'}
  990 |       operator[](key_type&& __k)
      |                  ~~~~~~~~~~~^~~