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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#198404#2838. 2D Geometryvanthoci#TL 0ms3788kbC++171.4kb2023-10-03 13:41:112023-10-03 13:41:12

Judging History

你现在查看的是最新测评结果

  • [2023-10-03 13:41:12]
  • 评测
  • 测评结果:TL
  • 用时:0ms
  • 内存:3788kb
  • [2023-10-03 13:41:11]
  • 提交

answer

#include<bits/stdc++.h>
// #define int long long 
using namespace std ;
using i64 = long long;

random_device SEED;
mt19937 RAND(SEED());

struct solve{
    int n;
    struct P{
        int x, y;
        P() { x =  y = 0; }
        P(int xx, int yy) { x = xx , y = yy; }
        void getIt(){
            cin >> x >> y;
        }
        friend i64 operator ^(P a, P b){
            return 1LL * a.x * b.y - 1LL * b.x * a.y;
        }
        friend P operator -(P a, P b){
            return P(a.x - b.x, a.y - b.y);
        }
    };
    vector<P> v;
    // solve() {cout << "called\n";}
    solve(int _n){
        n = _n;
        v.assign(n, P());
        for (auto& x : v) x.getIt();
        
        int omega = 100;
        int max_coline = 0;
        while (omega --){
            int now_coline = 0;
            int x = RAND() % n, y = RAND() % n;
            while (y == x) y = RAND() % n;
            for(auto vz : v){
                if(((vz - v[x]) ^ (vz - v[y])) == 0) now_coline++;
            }
            max_coline = max(max_coline, now_coline);
        }

        if (max_coline <= (n - max_coline) * 2) {
            cout << n % 3 << '\n';
        }else {
            cout << max_coline - (n - max_coline) * 2 << '\n';
        }
    }
};

signed main(){
    ios::sync_with_stdio(0);cin.tie(0) ;
    int n;
    while(cin >> n){
        auto x = solve(n) ;
    }
}

Details

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Test #1:

score: 100
Accepted
time: 0ms
memory: 3788kb

input:

3
0 0
0 1
0 2
3
0 0
0 1
1 0
6
0 0
0 1
0 2
0 3
1 1
1 2

output:

3
0
0

result:

ok 3 lines

Test #2:

score: -100
Time Limit Exceeded

input:

1
0 0
2
0 0
1 1
3
0 0
0 1
0 2
3
0 0
0 1
1 0
4
3 0
0 2
3 3
3 1
4
2 3
1 1
0 3
0 2
4
0 0
0 3
0 2
0 1
5
8 6
9 2
2 3
7 4
1 5
5
2 2
4 2
6 2
7 2
0 4
5
3 7
5 4
4 4
9 4
9 9
5
5 4
5 9
5 5
4 3
1 0
5
3 2
1 2
7 2
6 2
5 2
6
7 2
7 9
0 3
8 8
4 4
3 8
6
2 8
2 5
3 5
3 8
2 0
0 2
6
2 3
8 4
2 9
2 2
2 6
4 9
6
2 1
7 6
6 5
...

output:


result: