Submission #888295

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
888295	2023-12-16 21:30:36	ad_red	Tri (CEOI09_tri)	C++17	Compilation error	0 ms	0 KiB

tri

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#include <bits/stdc++.h>
using namespace std;
#define rep(i,a,n) for (int i=a;i<n;i++)
#define per(i,a,n) for (int i=n-1;i>=a;i--)
#define pb push_back
#define eb emplace_back
#define mp make_pair
#define all(x) (x).begin(),(x).end()
#define fi first
#define se second
#define SZ(x) ((int)(x).size())
typedef vector<int> VI;
typedef basic_string<int> B;
typedef long long ll;
typedef pair<int,int> PII;
// head
  
const int N=100100;
const int S=1200;
int n,m;
  
struct pt {
  int x,y;
  pt(int _x=0,int _y=0) : x(_x),y(_y) {}
}p[N];
ll vp(pt a, pt b) {
  return a.x * b.y - b.x * a.y;
}
 
 
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Compilation message (stderr)

tri.cpp: In function 'll sgn(pt, pt, pt)':
tri.cpp:41:39: error: 'pr' was not declared in this scope; did you mean 'p'?
   41 |   ll q = vp(pt{a.x - b.x, a.y - b.y}, pr{c.x - b.x, c.y - b.y});
      |                                       ^~
      |                                       p
tri.cpp: In function 'int main()':
tri.cpp:86:20: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   86 |         int mid=low+high>>1;
      |                 ~~~^~~~~
tri.cpp:99:20: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   99 |         int mid=low+high>>1;
      |                 ~~~^~~~~
tri.cpp:131:20: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  131 |         int mid=low+high>>1;
      |                 ~~~^~~~~
tri.cpp:57:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   57 |   scanf("%d%d",&n,&m);
      |   ~~~~~^~~~~~~~~~~~~~
tri.cpp:59:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   59 |     scanf("%d%d",&p[i].x,&p[i].y);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
tri.cpp:79:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   79 |     scanf("%d%d%d%d",&a.x,&a.y,&b.x,&b.y);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~