//#pragma GCC optimize ("O3")
//#pragma GCC target ("sse4")
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp> // Common file
#include <ext/pb_ds/tree_policy.hpp> // Including tree_order_statistics_node_update
using namespace std;
using namespace __gnu_pbds;
template<class T> using min_heap = priority_queue<T, vector<T>, greater<T>>;
#define FOR(i, a, b) for (int i=a; i<(b); i++)
#define F0R(i, a) for (int i=0; i<(a); i++)
#define F0R1(i, a) for (int i=1; i<=(a); i++)
#define FORd(i, a, b) for (int i = (b)-1; i >= a; i--)
#define F0Rd(i, a) for (int i = (a)-1; i >= 0; i--)
#define trav(a, x) for (auto& a : x)
#define MIN(a, b) a = min(a, b)
#define MAX(a, b) a = max(a, b)
#define INF 1000000010
#define LL_INF 4500000000000000000LL
#define LSOne(S) (S & (-S))
#define EPS 1e-9
#define pA first
#define pB second
#define mp make_pair
#define mt make_tuple
#define pb push_back
#define eb emplace_back
#define PI acos(-1.0)
// #define MOD (int)(2e+9+11)
#define MOD (int)(1e+9+7)
#define SET(vec, val, size) for (int i = 0; i < size; i++) vec[i] = val;
#define SET2D(arr, val, dim1, dim2) F0R(i, dim1) F0R(j, dim2) arr[i][j] = val;
#define SET3D(arr, val, dim1, dim2, dim3) F0R(i, dim1) F0R(j, dim2) F0R(k, dim3) arr[i][j][k] = val;
#define SET4D(arr, val, dim1, dim2, dim3, dim4) F0R(i, dim1) F0R(j, dim2) F0R(k, dim3) F0R(l, dim4) arr[i][j][k][l] = val;
#define lb lower_bound
#define ub upper_bound
#define sz(x) (int)x.size()
#define beg(x) x.begin()
#define en(x) x.end()
#define all(x) beg(x), en(x)
#define resz resize
#define SORT(vec) sort(all(vec))
#define RSORT(vec) sort(vec.rbegin(),vec.rend())
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
typedef pair<int, int> ii;
typedef pair<int, ii> iii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<iii> viii;
typedef vector<ll> vl;
// @formatter:off
// Source: Benq (https://github.com/bqi343/USACO) [Modified]
namespace input {
template<class T> void re(complex<T>& x);
template<class T1, class T2> void re(pair<T1,T2>& p);
template<class T> void re(vector<T>& a);
template<class T, size_t SZ> void re(array<T,SZ>& a);
template<class T> void reA(T A[], int sz);
template<class T> void re(T& x) { cin >> x; }
void re(double& x) { string t; re(t); x = stod(t); }
void re(ld& x) { string t; re(t); x = stold(t); }
template<class Arg, class... Args> void re(Arg& first, Args&... rest) {
re(first); re(rest...);
}
template<class T1, class T2> void re(pair<T1,T2>& p) { re(p.pA,p.pB); }
template<class T> void re(vector<T>& a) { F0R(i,sz(a)) re(a[i]); }
template<class T, size_t SZ> void re(array<T,SZ>& a) { F0R(i,SZ) re(a[i]); }
template<class T> void reA(T A[], int sz) { F0R(i, sz) re(A[i]); }
void setupIO(const string &PROB = "") {
ios::sync_with_stdio(false);
cin.tie(nullptr);
if (PROB.length() != 0) {
ifstream infile(PROB + ".in");
if (infile.good()) {
freopen((PROB + ".in").c_str(), "r", stdin);
freopen((PROB + ".out").c_str(), "w", stdout);
}
}
}
}
using namespace input;
namespace output {
template<class T1, class T2> void prD(const pair<T1,T2>& x);
template<class T, size_t SZ> void prD(const array<T,SZ>& x);
template<class T> void prD(const vector<T>& x);
template<class T> void prD(const set<T>& x);
template<class T1, class T2> void prD(const map<T1,T2>& x);
template<class T1, class T2> void pr(const pair<T1,T2>& x);
template<class T, size_t SZ> void pr(const array<T,SZ>& x);
template<class T> void pr(const vector<T>& x);
template<class T> void pr(const set<T>& x);
template<class T1, class T2> void pr(const map<T1,T2>& x);
template<class T> void prD(const T& x) { cout << x; cout.flush(); }
template<class Arg, class... Args> void prD(const Arg& first, const Args&... rest) {
prD(first); prD(rest...);
}
template<class T1, class T2> void prD(const pair<T1,T2>& x) {
prD("{",x.pA,", ",x.pB,"}");
}
template<class T> void prDContain(const T& x) {
prD("{");
bool fst = 1; for (const auto& a: x) prD(!fst?", ":"",a), fst = 0; // const needed for vector<bool>
prD("}");
}
template<class T, size_t SZ> void prD(const array<T,SZ>& x) { prDContain(x); }
template<class T> void prD(const vector<T>& x) { prDContain(x); }
template<class T> void prD(const set<T>& x) { prDContain(x); }
template<class T1, class T2> void prD(const map<T1,T2>& x) { prDContain(x); }
void psD() { prD("\n"); }
template<class Arg> void psD(const Arg& first) {
prD(first); psD(); // no space at end of line
}
template<class Arg, class... Args> void psD(const Arg& first, const Args&... rest) {
prD(first," "); psD(rest...); // print w/ spaces
}
template<class T> void pr(const T& x) { cout << x; }
template<class Arg, class... Args> void pr(const Arg& first, const Args&... rest) {
pr(first); pr(rest...);
}
template<class T1, class T2> void pr(const pair<T1,T2>& x) {
pr(x.pA, " ", x.pB);
}
template<class T> void prContain(const T& x) {
bool fst = 1; for (const auto& a: x) pr(!fst?" ":"",a), fst = 0; // const needed for vector<bool>
}
template<class T, size_t SZ> void pr(const array<T,SZ>& x) { prContain(x); }
template<class T> void pr(const vector<T>& x) { prContain(x); }
template<class T> void pr(const set<T>& x) { prContain(x); }
template<class T1, class T2> void pr(const map<T1,T2>& x) { prContain(x); }
void ps() { pr("\n"); }
template<class Arg> void ps(const Arg& first) {
pr(first); ps(); // no space at end of line
}
template<class Arg, class... Args> void ps(const Arg& first, const Args&... rest) {
pr(first," "); ps(rest...); // print w/ spaces
}
}
using namespace output;
// @formatter:on
/* ============================ */
struct point { ld x, y; // only used if more precision is needed
point() { x = y = 0.0; } // default constructor
point(ld _x, ld _y) : x(_x), y(_y) {} // user-defined
bool operator == (point other) const {
return (fabs(x-other.x) < EPS && (fabs(y-other.y) < EPS)); }
bool operator <(const point &p) const {
return x < p.x || (abs(x-p.x) < EPS && y < p.y); } };
struct vec { ld x, y; // name: `vec' is different from STL vector
vec(ld _x, ld _y) : x(_x), y(_y) {} };
vec toVec(point a, point b) { // convert 2 points to vector a->b
return vec(b.x-a.x, b.y-a.y); }
ld dot(vec a, vec b) { return (a.x*b.x + a.y*b.y); }
ld norm_sq(vec v) { return v.x*v.x + v.y*v.y; }
ld angle(point a, point o, point b) { // returns angle aob in rad
vec oa = toVec(o, a), ob = toVec(o, b);
return acos(dot(oa, ob) / sqrt(norm_sq(oa) * norm_sq(ob))); }
ld cross(vec a, vec b) { return a.x*b.y - a.y*b.x; }
// note: to accept collinear points, we have to change the `> 0'
// returns true if point r is on the left side of line pq
bool ccw(point p, point q, point r) {
return cross(toVec(p, q), toVec(p, r)) > 0; }
int n, m;
pair<point, int> A[30000];
point a, b;
vector<pair<ld, int>> sorted;
vector<int> toProcess;
bool isBelow[30000];
void solve(int t1, int t2) {
set<point> lower, upper;
trav(x, toProcess) {
if (A[x].pB == t2 && isBelow[x]) {
lower.insert(A[x].pA);
}
}
int ct = 0;
trav(x, toProcess) {
if (A[x].pB == t1) {
if (isBelow[x]) {
for (point p : lower) {
if (ccw(A[x].pA, b, p)) ct++;
}
for (point p : upper) {
if (ccw(A[x].pA, b, p)) ct++;
}
} else {
for (point p : lower) {
if (ccw(b, A[x].pA, p)) ct++;
}
for (point p : upper) {
if (ccw(b, A[x].pA, p)) ct++;
}
}
} else {
if (isBelow[x]) {
lower.erase(A[x].pA);
} else {
upper.insert(A[x].pA);
}
}
}
ps(ct);
}
int main() {
setupIO();
re(n, m);
F0R(i, n) {
int a, b, c; re(a, b, c);
A[i] = {point(a, b), c-1};
}
re(a.x, a.y, b.x, b.y);
F0R(i, n) {
if (ccw(b, a, A[i].pA)) {
isBelow[i] = true;
sorted.pb({PI-angle(b, a, A[i].pA), i});
} else {
isBelow[i] = false;
sorted.pb({angle(b, a, A[i].pA), i});
}
}
sort(all(sorted));
int q; re(q);
F0R(i, q) {
int a, b; re(a, b); --a; --b;
toProcess.clear();
F0R(i, n) {
int i2 = sorted[i].pB;
if (A[i2].pB == a || A[i2].pB == b) toProcess.pb(i2);
}
solve(a, b);
}
return 0;
}
Compilation message
dragon2.cpp: In function 'void input::setupIO(const string&)':
dragon2.cpp:88:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
freopen((PROB + ".in").c_str(), "r", stdin);
~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
dragon2.cpp:89:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
freopen((PROB + ".out").c_str(), "w", stdout);
~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
24 ms |
2040 KB |
Output is correct |
| 2 |
Correct |
39 ms |
2040 KB |
Output is correct |
| 3 |
Correct |
130 ms |
2040 KB |
Output is correct |
| 4 |
Correct |
999 ms |
3056 KB |
Output is correct |
| 5 |
Correct |
933 ms |
3244 KB |
Output is correct |
| 6 |
Correct |
19 ms |
2040 KB |
Output is correct |
| 7 |
Incorrect |
20 ms |
2040 KB |
Output isn't correct |
| 8 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Execution timed out |
4010 ms |
4832 KB |
Time limit exceeded |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
24 ms |
2040 KB |
Output is correct |
| 2 |
Correct |
39 ms |
2040 KB |
Output is correct |
| 3 |
Correct |
130 ms |
2040 KB |
Output is correct |
| 4 |
Correct |
999 ms |
3056 KB |
Output is correct |
| 5 |
Correct |
933 ms |
3244 KB |
Output is correct |
| 6 |
Correct |
19 ms |
2040 KB |
Output is correct |
| 7 |
Incorrect |
20 ms |
2040 KB |
Output isn't correct |
| 8 |
Halted |
0 ms |
0 KB |
- |
