제출 #287431

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
287431		ACmachine	원 고르기 (APIO18_circle_selection)	C++17	72 / 100	3093 ms	91504 KiB

circle_selection

#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;
    map<pii, unordered_set<int>> 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].insert(i);
            }
        }
    }
	void solve(){
		set<circle> pq;
        REP(i, circles.size()) pq.insert(circles[i]);
        int square_size = pq.begin()->r;
        rescale(square_size);
        vector<circle> circles_sorted = circles;
        sort(all(circles_sorted));
        for(circle c : circles_sorted){
            if(removed[c.id]) continue;
            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);
            vi toerase;
            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;
                    toerase.clear();
                    for(int c2id : grid[mp(i, j)]){
                        circle c2 = circles[c2id];
                        if(c.intersect(c2)){
                            out[c2.id] = c.id;
                            removed[c2.id] = true;
                            toerase.pb(c2.id); 
                        }
                    }
                    for(auto x : toerase) grid[mp(i, j)].erase(x);
                }
            }
        }
        /* 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)]){ */
        /*                 if(removed[c2id]) continue; */
        /*                 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;
}

컴파일 시 표준 에러 (stderr) 메시지

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]);
      |         ^~~

• Subtask 1: 7 / 7
• Subtask 2: 12 / 12
• Subtask 3: 0 / 15
• Subtask 4: 23 / 23
• Subtask 5: 30 / 30
• Subtask 6: 0 / 13