제출 #111274

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
111274	2019-05-14 14:54:40	diamond_duke	원 고르기 (APIO18_circle_selection)	C++11	100 / 100	1370 ms	28400 KiB

circle_selection

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#include <algorithm>
#include <cstdio>
#include <vector>
using ll = long long;
inline ll sqr(int x) { return (ll)x * x; }
struct circle { int x, y, r; } arr[300005], seq[300005];
inline bool operator <(const circle &a, const circle &b) { return a.x < b.x || (a.x == b.x && a.y < b.y); }
inline bool operator !=(const circle &a, const circle &b) { return a < b || b < a; }
inline bool operator ==(const circle &a, const circle &b) { return !(a != b); }
inline bool inter(circle a, circle b) { return sqr(a.x - b.x) + sqr(a.y - b.y) <= sqr(a.r + b.r); }
int ans[300005], ord[300005], n, blk, len;
std::vector<int> vec[300005];
void resize(int sz)
{
  if (blk && blk / 2 < sz)
    return;
  blk = sz;
  int cnt = 0;
  for (int i = 0; i < n; i++)
  {
    if (-1 == ans[i])
      seq[cnt++] = {arr[i].x / blk, arr[i].y / blk, i};
  }
  std::sort(seq, seq + cnt);
  len = 0;
  for (int i = 0, j = 0; i < cnt; i = j)
  {
    while (j < cnt && seq[i] == seq[j])
      j++;
    vec[len].clear();
 
 
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컴파일 시 표준 에러 (stderr) 메시지

circle_selection.cpp: In function 'int main()':
circle_selection.cpp:39:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
  ~~~~~^~~~~~~~~~
circle_selection.cpp:42:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%d", &arr[i].x, &arr[i].y, &arr[i].r);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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