Submission #123215

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
123215	2019-06-30 12:02:46	tmwilliamlin168	Relay (COI16_relay)	C++14	100 / 100	95 ms	9128 KiB

relay

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#include <bits/stdc++.h>
using namespace std;
#define ll long long
const int mxN=1e5;
int n, m, ans;
ll xa[mxN], ya[mxN], xb[2*mxN], yb[2*mxN];
struct ts {
  int li, ri;
  ll lx, ly, rx, ry;
};
ll cp(ll x1, ll y1, ll x2, ll y2, ll x3, ll y3) {
  return (y3-y1)*(x2-x1)-(y2-y1)*(x3-x1);
}
ts gts(ll x, ll y) {
  ts r;
  if(cp(x, y, xb[m-1], yb[m-1], xb[0], yb[0])<0) {
    //cout << x << " " << y << endl;
    int lb=0, rb=m-2;
    while(lb<rb) {
      int mb=(lb+rb+1)/2;
      if(cp(x, y, xb[m-1], yb[m-1], xb[mb], yb[mb])<0&&cp(x, y, xb[mb-1], yb[mb-1], xb[mb], yb[mb])<0)
        lb=mb;
      else
        rb=mb-1;
    }
 
 
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• Subtask 1: 18 / 18
• Subtask 2: 19 / 19
• Subtask 3: 20 / 20
• Subtask 4: 43 / 43