#include <bits/stdc++.h>
using namespace std;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
template<typename T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
template<typename T, typename U> using ordered_map = tree<T, U, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long ll;
typedef long double ld;
typedef double db;
typedef string str;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<pii> vpii;
typedef vector<pll> vpll;
typedef vector<str> vstr;
#define FOR(i,j,k,in) for(int i=(j); i < (k);i+=in)
#define FORD(i,j,k,in) for(int i=(j); i >=(k);i-=in)
#define REP(i,b) FOR(i,0,b,1)
#define REPD(i,b) FORD(i,b,0,1)
#define pb push_back
#define mp make_pair
#define ff first
#define ss second
#define all(x) begin(x), end(x)
#define rsz resize
const double EPS = 1e-9;
const int MOD = 1e9+7; // 998244353;
const ll INFF = 1e18;
const int INF = 1e9;
const ld PI = acos((ld)-1);
const vi dy = {1, 0, -1, 0, -1, 1, 1, -1};
const vi dx = {0, 1, 0, -1, -1, 1, -1, 1};
#ifdef DEBUG
#define DBG if(1)
#else
#define DBG if(0)
#endif
#define dbg(x) cout << "(" << #x << " : " << x << ")" << endl;
// ostreams
template <class T, class U>
ostream& operator<<(ostream& out, const pair<T, U> &par) {out << "[" << par.first << ";" << par.second << "]"; return out;}
template <class T>
ostream& operator<<(ostream& out, const set<T> &cont) { out << "{"; for( const auto &x:cont) out << x << ", "; out << "}"; return out; }
template <class T, class U>
ostream& operator<<(ostream& out, const map<T, U> &cont) {out << "{"; for( const auto &x:cont) out << x << ", "; out << "}"; return out; }
template<class T>
ostream& operator<<(ostream& out, const vector<T> &v){ out << "["; REP(i, v.size()) out << v[i] << ", "; out << "]"; return out;}
// istreams
template<class T>
istream& operator>>(istream& in, vector<T> &v){ for(auto &x : v) in >> x; return in; }
template<class T, class U>
istream& operator>>(istream& in, pair<T, U> &p){ in >> p.ff >> p.ss; return in; }
//searches
template<typename T, typename U>
T bsl(T lo, T hi, U f){ hi++; T mid; while(lo < hi){ mid = (lo + hi)/2; f(mid) ? hi = mid : lo = mid+1; } return lo; }
template<typename U>
double bsld(double lo, double hi, U f, double p = 1e-9){ int r = 3 + (int)log2((hi - lo)/p); double mid; while(r--){ mid = (lo + hi)/2; f(mid) ? hi = mid : lo = mid; } return (lo + hi)/2; }
template<typename T, typename U>
T bsh(T lo, T hi, U f){ lo--; T mid; while(lo < hi){ mid = (lo + hi + 1)/2; f(mid) ? lo = mid : hi = mid-1; } return lo; }
template<typename U>
double bshd(double lo, double hi, U f, double p = 1e-9){ int r = 3+(int)log2((hi - lo)/p); double mid; while(r--){ mid = (lo + hi)/2; f(mid) ? lo = mid : hi = mid; } return (lo + hi)/2; }
// some more utility functions
template<typename T>
pair<T, int> get_min(vector<T> &v){ typename vector<T> :: iterator it = min_element(v.begin(), v.end()); return mp(*it, it - v.begin());}
template<typename T>
pair<T, int> get_max(vector<T> &v){ typename vector<T> :: iterator it = max_element(v.begin(), v.end()); return mp(*it, it - v.begin());}
template<typename T> bool ckmin(T& a, const T& b){return b < a ? a = b , true : false;}
template<typename T> bool ckmax(T& a, const T& b){return b > a ? a = b, true : false;}
struct circle{
pii mid;
int r;
int id;
circle(pii _mid, int _r, int _id){
mid = _mid; r = _r; id = _id;
}
bool intersect(circle &other){
ll dist = (ll)(mid.ff - other.mid.ff)*(mid.ff - other.mid.ff) + (ll)(mid.ss - other.mid.ss)*(mid.ss - other.mid.ss);
ll radsum = r + other.r;
radsum *= radsum;
return radsum >= dist;
}
};
struct hash_pair{
size_t operator()(const pair<int, int>& p) const
{
auto hsh1 = hash<int>{}(p.ff);
auto hsh2 = hash<int>{}(p.ss);
return hsh1 ^ hsh2;
}
};
bool operator<(const circle &lhs, const circle &rhs){
if(lhs.r == rhs.r) return lhs.id < rhs.id;
return lhs.r > rhs.r;
}
struct AcAutomaton{
int n;
vi out;
vector<circle> circles;
unordered_map<pii, vi, hash_pair> grid;
vector<bool> removed;
void read_in(){
cin >> n;
out.rsz(n, -1);
removed.rsz(n, false);
REP(i, n){
pii mid; int r; cin >> mid >> r;
circles.pb(circle(mid, r, i));
}
}
void rescale(int square_size){
grid.clear();
REP(i, n){
if(!removed[i]){
circle c = circles[i];
pii newmid = mp(c.mid.ff / square_size, c.mid.ss / square_size);
grid[newmid].pb(i);
}
}
}
void solve(){
set<circle> pq;
REP(i, circles.size()) pq.insert(circles[i]);
int square_size = pq.begin()->r;
rescale(square_size);
while(!pq.empty()){
circle c = *pq.begin();
if(c.r <= square_size/2) {
square_size = c.r;
rescale(square_size);
}
pii newmid = mp(c.mid.ff / square_size, c.mid.ss / square_size);
FOR(i, newmid.ff - 2, newmid.ff + 3, 1){
FOR(j, newmid.ss - 2, newmid.ss + 3, 1){
if(grid.find(mp(i, j)) == grid.end()) continue;
for(int c2id : grid[mp(i, j)]){
circle c2 = circles[c2id];
if(c.intersect(c2)){
out[c2.id] = c.id;
removed[c2.id] = true;
pq.erase(c2);
}
}
}
}
}
REP(i, n) cout << out[i]+1 << (i == n - 1 ? "\n" : " ");
}
};
int main(){
ios_base::sync_with_stdio(false);
cin.tie(NULL); cout.tie(NULL);
int tcase = 1;
while(tcase--){
AcAutomaton solver;
solver.read_in();
solver.solve();
}
return 0;
}
Compilation message
circle_selection.cpp: In member function 'void AcAutomaton::solve()':
circle_selection.cpp:26:40: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<circle>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
26 | #define FOR(i,j,k,in) for(int i=(j); i < (k);i+=in)
| ^
circle_selection.cpp:28:18: note: in expansion of macro 'FOR'
28 | #define REP(i,b) FOR(i,0,b,1)
| ^~~
circle_selection.cpp:138:9: note: in expansion of macro 'REP'
138 | REP(i, circles.size()) pq.insert(circles[i]);
| ^~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
384 KB |
Output is correct |
| 2 |
Correct |
0 ms |
384 KB |
Output is correct |
| 3 |
Correct |
0 ms |
384 KB |
Output is correct |
| 4 |
Correct |
0 ms |
384 KB |
Output is correct |
| 5 |
Correct |
0 ms |
384 KB |
Output is correct |
| 6 |
Correct |
1 ms |
384 KB |
Output is correct |
| 7 |
Correct |
1 ms |
384 KB |
Output is correct |
| 8 |
Incorrect |
1 ms |
384 KB |
Output isn't correct |
| 9 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
563 ms |
37228 KB |
Output is correct |
| 2 |
Incorrect |
658 ms |
35940 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
384 KB |
Output is correct |
| 2 |
Correct |
1080 ms |
22388 KB |
Output is correct |
| 3 |
Execution timed out |
3089 ms |
65368 KB |
Time limit exceeded |
| 4 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1368 ms |
67168 KB |
Output is correct |
| 2 |
Correct |
1115 ms |
66392 KB |
Output is correct |
| 3 |
Execution timed out |
3050 ms |
43476 KB |
Time limit exceeded |
| 4 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
384 KB |
Output is correct |
| 2 |
Correct |
0 ms |
384 KB |
Output is correct |
| 3 |
Correct |
0 ms |
384 KB |
Output is correct |
| 4 |
Correct |
0 ms |
384 KB |
Output is correct |
| 5 |
Correct |
0 ms |
384 KB |
Output is correct |
| 6 |
Correct |
1 ms |
384 KB |
Output is correct |
| 7 |
Correct |
1 ms |
384 KB |
Output is correct |
| 8 |
Incorrect |
1 ms |
384 KB |
Output isn't correct |
| 9 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
384 KB |
Output is correct |
| 2 |
Correct |
0 ms |
384 KB |
Output is correct |
| 3 |
Correct |
0 ms |
384 KB |
Output is correct |
| 4 |
Correct |
0 ms |
384 KB |
Output is correct |
| 5 |
Correct |
0 ms |
384 KB |
Output is correct |
| 6 |
Correct |
1 ms |
384 KB |
Output is correct |
| 7 |
Correct |
1 ms |
384 KB |
Output is correct |
| 8 |
Incorrect |
1 ms |
384 KB |
Output isn't correct |
| 9 |
Halted |
0 ms |
0 KB |
- |
