Submission #97710

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
97710	2019-02-17T18:50:40 Z	dalgerok	Circle selection (APIO18_circle_selection)	C++14	Compilation error	0 ms	0 KB

circle_selection

#include<bits/stdc++.h>
#include<ext/pb_ds/assoc_container.hpp>
using namespace std;
using namespace __gnu_pbds;


const int N = 3e5 + 5;



int n, x[N], y[N], r[N], a[N];
int kill[N], bound;

inline bool cmp(int xx, int yy){
    return r[xx] > r[yy] || (r[xx] == r[yy] && xx < yy);
}

struct custom_hash {
    static uint64_t f(uint64_t x) {
        return x ^ (x >> 31);
    }

    size_t operator()(pair <int, int> x) const {
        static const uint64_t FIXED_RANDOM1 = chrono::steady_clock::now().time_since_epoch().count();
        static const uint64_t FIXED_RANDOM2 = chrono::steady_clock::now().time_since_epoch().count();
        return f(x.first + FIXED_RANDOM1) ^ f(x.second + FIXED_RANDOM2);
    }
};
gp_hash_table < pair < int, int >, vector < int >, custom_hash > q;
inline void update(){
    q.clear();
    for(int i = 1; i <= n; i++){
        if(!kill[i]){
            q[make_pair(x[i] / bound, y[i] / bound)].push_back(i);
        }
    }
}

inline bool intersect(int i, int j){
    return  1LL * (x[i] - x[j]) * (x[i] - x[j])
            +
            1LL * (y[i] - y[j]) * (y[i] - y[j])
            <=
            1LL * (r[i] + r[j]) * (r[i] + r[j]);
}

int main(){
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    cin >> n;
    for(int i = 1; i <= n; i++){
        cin >> x[i] >> y[i] >> r[i];
        a[i] = i;
    }
    sort(a + 1, a + n + 1, cmp);
    bound = 2e9 + 5;
    int pos = 1;
    while(true){
        while(pos <= n && kill[a[pos]]){
            pos += 1;
        }
        if(pos == n + 1){
            break;
        }
        int cur = a[pos];
        if(2 * r[cur] <= bound){
            bound = r[cur];
            cout << "YEAH " << bound << " " << cur << "\n";
            update();
        }
        kill[cur] = cur;
        cout << cur << "\n";
        int xx = x[cur] / bound,
            yy = y[cur] / bound;
        cout << "SUKA " << xx << " " << yy << "\n";
        for(int i = xx - 2; i <= xx + 2; i++){
            for(int j = yy - 2; j <= yy + 2; j++){
                if(q.find(make_pair(i, j)) != q.end()){
                    vector < int > nq;
                    cout << "BLYA " << cur << " " << i << " " << j << " " << xx << " " << yy << "\n";
                    for(auto it : q[make_pair(i, j)]){
                        cout << cur << " " << it << "\n";
                        if(intersect(cur, it)){
                            kill[it] = cur;
                        }
                        else{
                            nq.push_back(it);
                        }
                    }
                    q[make_pair(i, j)] = nq;
                }
            }
        }
    }
    for(int i = 1; i <= n; i++){
        cout << kill[i] << " ";
    }
}
/**
11
9 9 2
13 2 1
11 8 2
3 3 2
3 12 1
12 14 1
9 8 5
2 8 2
5 2 1
14 4 2
14 14 1
*/

Compilation message

circle_selection.cpp:12:11: error: 'int kill [300005]' redeclared as different kind of symbol
 int kill[N], bound;
           ^
In file included from /usr/include/c++/7/csignal:42:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:43,
                 from circle_selection.cpp:1:
/usr/include/signal.h:127:12: note: previous declaration 'int kill(__pid_t, int)'
 extern int kill (__pid_t __pid, int __sig) __THROW;
            ^~~~
circle_selection.cpp: In function 'void update()':
circle_selection.cpp:33:19: warning: pointer to a function used in arithmetic [-Wpointer-arith]
         if(!kill[i]){
                   ^
circle_selection.cpp: In function 'int main()':
circle_selection.cpp:58:38: warning: pointer to a function used in arithmetic [-Wpointer-arith]
         while(pos <= n && kill[a[pos]]){
                                      ^
circle_selection.cpp:70:17: warning: pointer to a function used in arithmetic [-Wpointer-arith]
         kill[cur] = cur;
                 ^
circle_selection.cpp:70:21: error: assignment of read-only location '*(kill + ((sizetype)cur))'
         kill[cur] = cur;
                     ^~~
circle_selection.cpp:70:21: error: cannot convert 'int' to 'int(__pid_t, int) throw () {aka int(int, int) throw ()}' in assignment
circle_selection.cpp:83:36: warning: pointer to a function used in arithmetic [-Wpointer-arith]
                             kill[it] = cur;
                                    ^
circle_selection.cpp:83:40: error: assignment of read-only location '*(kill + ((sizetype)it))'
                             kill[it] = cur;
                                        ^~~
circle_selection.cpp:83:40: error: cannot convert 'int' to 'int(__pid_t, int) throw () {aka int(int, int) throw ()}' in assignment
circle_selection.cpp:95:23: warning: pointer to a function used in arithmetic [-Wpointer-arith]
         cout << kill[i] << " ";
                       ^