Submission #397474

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
397474	2021-05-02 09:38:06	AriaH	Circle selection (APIO18_circle_selection)	C++11	87 / 100	3097 ms	331584 KiB

circle_selection

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/* There's someone in my head but it's not me */ 
#include <bits/stdc++.h>
#pragma GCC optimize("Ofast")
#pragma GCC target("avx")
 
using namespace std;
 
typedef long long int ll;
typedef pair<int, int> pii;
 
#define SZ(x)                       (int) x.size()
#define F                           first
#define S                           second
 
const int N = 3e5 + 4, MOD = 1e9 + 7;
int n, X[N], Y[N], R[N], ord[N], xord[N], pos[N], ret[N]; vector<int> ids;
ll base[N];
int intersect(int i, int j)
{
    return (base[i] + base[j] + 2ll * (1ll * X[i] * X[j] + 1ll * Y[i] * Y[j] + 1ll * R[i] * R[j])) >= 0;
}
 
struct node : set<pii> {
    node *lc, *rc;
 
    node() : lc(nullptr), rc(nullptr) {}
 
    void build(int l = 1, int r = n + 1) {
 
 
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Compilation message (stderr)

circle_selection.cpp: In function 'int main()':
circle_selection.cpp:67:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   67 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
circle_selection.cpp:69:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   69 |         scanf("%d%d%d", &X[i], &Y[i], &R[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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