Submission #319042

#	Time	Username	Problem	Language	Result	Execution time	Memory
319042		fivefourthreeone	Dragon 2 (JOI17_dragon2)	C++17	15 / 100	4077 ms	1824 KiB

dragon2

#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
#include <bits/stdc++.h>
#define owo(i,a, b) for(auto i=(a);i<(b); ++i)
#define uwu(i,a, b) for(auto i=(a)-1; i>=(b); --i)
#define senpai push_back
#define ttgl pair<int, int>
#define ayaya cout<<"ayaya~"<<endl
using namespace std;
/*#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define ordered_set tree<ttgl, null_type,less<ttgl>, rb_tree_tag,tree_order_statistics_node_update>*/
 
using ll = long long;
using ld = long double;
const ll MOD = 1000000007;
const ll root = 62;
ll binpow(ll a,ll b){ll res=1;while(b){if(b&1)res=(res*a)%MOD;a=(a*a)%MOD;b>>=1;}return res;}
ll modInv(ll a){return binpow(a, MOD-2);}
const double PI = atan(1);
const double eps = 1e-10;
const int INF = 0x3f3f3f3f;
const int NINF = 0xc0c0c0c0;
const ll INFLL = 0x3f3f3f3f3f3f3f3f;
const ll NINFLL = 0xc0c0c0c0c0c0c0c0;
const int mxN = 30001;
const int magic = 10;
struct pt {
    ll x, y;
    pt(ll x = 0, ll y = 0) : x(x), y(y) {}
    bool operator < (const pt &o) const {
        return (x == o.x ? y < o.y : x < o.x);
    }
    pt operator - (const pt &o) const {
        return pt(x - o.x, y - o.y);
    }
};
ll cross(pt a, pt b) {
    return a.x * b.y - a.y * b.x;
}
bool ccw(pt &a, pt &b, pt &c) {
    return cross(a-b, c-b) <= 0;
}
vector<pt> tribe[mxN];
int ord[mxN];
int bck[mxN];
int ans[magic][magic];
bool ma[mxN];
int n, m, q;
pt x, y;
bool chk(pt &a, pt &b) {
    if(ccw(a, x, y)) {
        if(ccw(a, x, b) && ccw(b, y, a))return 1;
    }else {
        if(ccw(b, x, a) && ccw(a, y, b))return 1;
    }
    return 0;
}
int main() {
    //freopen("file.in", "r", stdin);
    //freopen("file.out", "w", stdout);
    mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
    cin.tie(0)->sync_with_stdio(0);
    scanf("%d %d\n", &n, &m);
    int a, b, c;
    owo(i, 0, n) {
        scanf("%d %d %d\n", &a, &b, &c);
        c--;
        tribe[c].senpai({a, b});
    }
    iota(ord, ord+m, 0);
    sort(ord, ord+m, [&](int o1, int o2) {
        return tribe[o1].size() > tribe[o2].size();
    });
    scanf("%lld %lld %lld %lld\n", &x.x, &x.y, &y.x, &y.y);
    owo(i, 0, m) {
        bck[ord[i]] = i;
        if(i < magic) {
            ma[i] = true;
        }
    }
    owo(i, 0, min(m, magic)) {
        owo(j, 0, min(m, magic)) {
            if(i==j)continue;
            int t1 = ord[i];
            int t2 = ord[j];
            for(auto &k1: tribe[t1]) {
                for(auto &k2: tribe[t2]) {
                    ans[i][j]+=chk(k1, k2);
                    /*if (ccw(k1, x, y)) ans[i][j] += (ccw(k1, x, k2) && ccw(k2, y, k1));
			        else ans[i][j] += (ccw(k2, x, k1) && ccw(k1, y, k2));*/
                }
            }
        }
    }
    scanf("%d\n", &q);
    while(q--) {
        scanf("%d %d\n", &a, &b);
        a--; b--;
        if(ma[bck[a]] && ma[bck[b]]) {
            printf("%d \n", ans[bck[a]][bck[b]]);
        }else {
            int res = 0;
            for(auto &k1: tribe[a]) {
                for(auto &k2: tribe[b]) {
                    res+=chk(k1, k2);
                }
            }
            printf("%d \n", res);
        }
    }
    return 0;
}

Compilation message (stderr)

dragon2.cpp:2: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
    2 | #pragma GCC optimization ("O3")
      | 
dragon2.cpp:3: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
    3 | #pragma GCC optimization ("unroll-loops")
      | 
dragon2.cpp: In function 'int main()':
dragon2.cpp:65:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   65 |     scanf("%d %d\n", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~
dragon2.cpp:68:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   68 |         scanf("%d %d %d\n", &a, &b, &c);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
dragon2.cpp:76:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   76 |     scanf("%lld %lld %lld %lld\n", &x.x, &x.y, &y.x, &y.y);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
dragon2.cpp:97:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   97 |     scanf("%d\n", &q);
      |     ~~~~~^~~~~~~~~~~~
dragon2.cpp:99:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   99 |         scanf("%d %d\n", &a, &b);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~

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