Submission #126019

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
126019	2019-07-06 18:15:12	zeyad49	Mountains (IOI17_mountains)	C++17	100 / 100	39 ms	14200 KiB

mountains

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#include "mountains.h"
#define x first
#define y second
using namespace std;
typedef pair<long long,long long> point;
const int MAX = 2005;
int dp[MAX][MAX];
point p[MAX];
long long ccw(point a, point b, point c)
{
  return (b.x - a.x) * (c.y - a.y) - (b.y - a.y) * (c.x - a.x);
}
int maximum_deevs(vector<int> y)
{
  int n = y.size();
  for (int i = 0; i < n; i++)
  {
    p[i].y = y[i];
    p[i].x = i;
  }
  for (int r = 0; r < n; r++)
  {
    int sum = 0, last = r;
    
    dp[r][r] = 1;
    for (int l = r - 1; l >= 0; l--)
    {
      dp[l][r] = dp[l][r - 1];
      if (ccw(p[l], p[last], p[r]) >= 0)
      {
 
 
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• Subtask 1: 20 / 20
• Subtask 2: 20 / 20
• Subtask 3: 30 / 30
• Subtask 4: 30 / 30