Submission #797236

#	Time	Username	Problem	Language	Result	Execution time	Memory
797236		dimasnbayu	Rabbit Carrot (LMIO19_triusis)	C++14	Compilation error	0 ms	0 KiB

triusis

#include <bits/stdc++.h>
using namespace std;
#define start cin.tie(0); cout.tie(0); ios_base::sync_with_stdio(0);
#define endl '\n'
#define pii pair<int,int>
#define pll pair<long long, long long>
#define fflush(stdout); cout.flush();

struct point{
	int x, y;
};

int crossproduct(point a, point b, point c){
	//point a biasanya titik (0, 0);
	int area=(b.x-a.x) *  (c.y-a.y) - (b.y-a.y) * (c.x-a.x);

	if(area<0) return -1; // clockwise
	else if(area>0) return 1; // counter clockwise
	return 0; // colinear
}

int orientation(point p1, point p2, point p3){
	int val=(p2.y-p1.y)(p3.x-p2.x) - (p3.y-p2.y)(p2.x-p1.x);

	if(val==0) return 0; // colinear
	else if(val>0) return 1; // clockwise
	else return 2; // counter clockwise
}

bool validcolinear(int a, int b, int c, int d){
	if(a>b) swap(a, b);
	if(c>d) swap(c, d);
	return max(a, c)<=min(b, d);
}

bool intersect(point a, point b, point c, point d){
	int o1=orientation(a, b, c);
	int o2=orientation(a, b, d);
	int o3=orientation(c, d, a);
	int o4=orientation(c, d, b);

	if(o1!=o2 && o3!=o4) return 1;
	if(o1==0 && o2==0 && o3==0 && o4==0){
		//all of 4 points are colinear
		if(validcolinear(a.x, b.x, c.x, d.x) && validcolinear(a.y, b.y, c.y, d.y)){
			return 1;
		}
	}
	return 0;
}

/*********************************/
/*********************************/

int a[200005], b[200005];
int main(){
	start
    int n, m; cin>>n>>m;
    for(int i=1;i<=n;i++){
        cin>>a[i];
        b[i]=(m*i)-a[i];
        // if(b[i]<0) b[i]=0;
    }   
    
    vector<int>v;
    // v.push_back(0);
    for(int i=1;i<=n;i++){
        int x=b[i];
        if(x<=0) continue;
        int l=0, r=v.size()-1;
        int idx=-1;
        while(l<=r){
            int mid=(l+r)/2;
            if(x<=v[mid]){
                r=mid-1;
                idx=mid;
            }
            else l=mid+1;
        }
        if(idx!=-1) v[idx]=x;
        else v.push_back(x);
    }
    int komp=v.size();
    if(a[1]<=m) komp++;
    // if(komp==1) komp--;
    cout<<n-komp<<endl;
}

Compilation message (stderr)

triusis.cpp: In function 'int orientation(point, point, point)':
triusis.cpp:23:31: error: expression cannot be used as a function
   23 |  int val=(p2.y-p1.y)(p3.x-p2.x) - (p3.y-p2.y)(p2.x-p1.x);
      |                               ^
triusis.cpp:23:56: error: expression cannot be used as a function
   23 |  int val=(p2.y-p1.y)(p3.x-p2.x) - (p3.y-p2.y)(p2.x-p1.x);
      |                                                        ^