Submission #240597

#	Time	Username	Problem	Language	Result	Execution time	Memory
240597		osaaateiasavtnl	Dragon 2 (JOI17_dragon2)	C++17	15 / 100	139 ms	49212 KiB

dragon2

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define ii pair <int, int>
#define app push_back
#define all(a) a.begin(), a.end()
#define bp __builtin_popcountll
#define ll long long
#define mp make_pair
#define f first
#define s second
#define Time (double)clock()/CLOCKS_PER_SEC

const int N = 3007;
struct Point {
    int x, y, c;
    Point operator - (Point p) {
        return {x - p.x, y - p.y};
    }   
    int operator *(Point p) {
        return x * p.y - y * p.x;
    }   
} a[N];  

int sign(int x) {
    if (x < 0)
        return -1;
    else if (x == 0)
        return 0;
    else
        return 1;
}   

int ans[N][N];
signed main() {
    #ifdef HOME
    freopen("input.txt", "r", stdin);
    #else
    #define endl '\n'
    ios_base::sync_with_stdio(0); cin.tie(0);
    #endif

    int n, m;
    cin >> n >> m;
    for (int i = 1; i <= n; ++i) {
        cin >> a[i].x >> a[i].y >> a[i].c;
    }   
    Point A, B;
    cin >> A.x >> A.y;
    cin >> B.x >> B.y;
    
    for (int i = 1; i <= n; ++i) {
        auto l = A - a[i];
        auto r = B - a[i];
        for (int j = 1; j <= n; ++j) {
            if (a[i].c == a[j].c)
                continue;

            auto v = a[j] - a[i];
            if (sign(l * r) * sign(l * v) > 0 && sign(l * r) * sign(v * r) > 0) {
                ++ans[a[i].c][a[j].c];
            }     
        }   
    }   

    int q;
    cin >> q;
    while (q--) {
        int c1, c2;
        cin >> c1 >> c2;
        cout << ans[c1][c2] << endl;
    }   
}

• Subtask 1: 15 / 15
• Subtask 2: 0 / 45
• Subtask 3: 0 / 40