Submission #424987

#	Time	Username	Problem	Language	Result	Execution time	Memory
424987		Runtime_error_	Triangles (CEOI18_tri)	C++14	20 / 100	1 ms	292 KiB

tri

#include "trilib.h"
#include <bits/stdc++.h>
using namespace std;
int n;
set<int> s;
int go(int x){
        int y = n;
        if(x == n)
            y = 1;
        for(int j=1;j<=n;j++){
            if(j == x || j == y)
                continue;
            if(x < 1 || x>n || y<1 || y>n )
                while(1);
            if(is_clockwise(x,y,j))
                y = j;
        }
        return y;
}

int main(){
    s.clear();
    n = get_n();
    for(int i=1;i<=n;i++){
        int neighbour = go(i);
        if(s.count(neighbour)){
            give_answer(n-1);
            return 0;
        }
        s.insert(neighbour);
    }
    give_answer(n);
}
/*
6
1 1
4 3
2 2
1 4
5 1
3 2
*/

• Subtask 1: 0 / 15
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 20 / 20
• Subtask 5: 0 / 25