結果
| 問題 | No.461 三角形はいくつ? |
| コンテスト | |
| ユーザー |
しらっ亭
|
| 提出日時 | 2016-12-12 04:29:46 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.89.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 6,155 bytes |
| 記録 | |
| コンパイル時間 | 2,239 ms |
| コンパイル使用メモリ | 186,632 KB |
| 実行使用メモリ | 97,252 KB |
| 最終ジャッジ日時 | 2024-11-29 14:38:06 |
| 合計ジャッジ時間 | 29,037 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 15 WA * 26 |
ソースコード
#include <bits/stdc++.h>
using namespace std;
#define _p(...) (void)printf(__VA_ARGS__)
#define forr(x,arr) for(auto&& x:arr)
#define _overload3(_1,_2,_3,name,...) name
#define _rep2(i,n) _rep3(i,0,n)
#define _rep3(i,a,b) for(int i=int(a);i<int(b);++i)
#define rep(...) _overload3(__VA_ARGS__,_rep3,_rep2,)(__VA_ARGS__)
#define _rrep2(i,n) _rrep3(i,0,n)
#define _rrep3(i,a,b) for(int i=int(b)-1;i>=int(a);i--)
#define rrep(...) _overload3(__VA_ARGS__,_rrep3,_rrep2,)(__VA_ARGS__)
#define all(x) (x).begin(), (x).end()
#define bit(n) (1LL<<(n))
#define sz(x) ((int)(x).size())
#define fst first
#define snd second
using ll=long long;using pii=pair<int,int>;
using vb=vector<bool>;using vs=vector<string>;
using vi=vector<int>;using vvi=vector<vi>;using vvvi=vector<vvi>;
using vl=vector<ll>;using vvl=vector<vl>;using vvvl=vector<vvl>;
using vd=vector<double>;using vvd=vector<vd>;using vvvd=vector<vvd>;
using vpii=vector<pii>;using vvpii=vector<vpii>;using vvvpii=vector<vvpii>;
template<typename T>T read(){T t;cin>>t;return t;}
template<class T,class U>ostream&operator<<(ostream&o,const pair<T,U>&p){o<<'('<<p.fst<<", "<<p.snd<<')';return o;}
#define A first
#define B second
typedef long long Integer;
Integer gcd(Integer a, Integer b) { return a > 0 ? gcd(b % a, a) : b; }
struct rational {
Integer p, q;
void normalize() { // keep q positive
if (q < 0) p *= -1, q *= -1;
Integer d = gcd(p < 0 ? -p : p, q);
if (d == 0) p = 0, q = 1;
else p /= d, q /= d;
}
rational(Integer p, Integer q = 1) : p(p), q(q) {
normalize();
}
rational &operator += (const rational &a) {
p = a.q * p + a.p * q; q = a.q * q; normalize();
return *this;
}
rational &operator -= (const rational &a) {
p = a.q * p - a.p * q; q = a.q * q; normalize();
return *this;
}
rational &operator *= (const rational &a) {
p *= a.p; q *= a.q; normalize();
return *this;
}
rational &operator /= (const rational &a) {
p *= a.q; q *= a.p; normalize();
return *this;
}
rational &operator - () {
p *= -1;
return *this;
}
};
rational operator + (const rational &a, const rational &b) {
return rational(a) += b;
}
rational operator * (const rational &a, const rational &b) {
return rational(a) *= b;
}
rational operator - (const rational &a, const rational &b) {
return rational(a) -= b;
}
rational operator / (const rational &a, const rational &b) {
return rational(a) /= b;
}
bool operator < (const rational &a, const rational &b) { // avoid overflow
return (long double) a.p * b.q < (long double) a.q * b.p;
}
bool operator <= (const rational &a, const rational &b) {
return !(b < a);
}
bool operator > (const rational &a, const rational &b) {
return b < a;
}
bool operator >= (const rational &a, const rational &b) {
return !(a < b);
}
bool operator == (const rational &a, const rational &b) {
return !(a < b) && !(b < a);
}
bool operator != (const rational &a, const rational &b) {
return (a < b) || (b < a);
}
inline int cmp(int a, int b, int c, int d) {
ll ad = a * d;
ll cb = c * b;
ll ret = ad - cb;
if (ret > 0) return 1;
if (ret < 0) return -1;
return 0;
}
inline bool cmp_b(const pii &lhs, decltype(lhs) rhs) {
return cmp(lhs.A, lhs.B, rhs.A, rhs.B) <= 0;
}
// a/(a+b) と足したら1を越えるのが何本あるか
// O(log |S|)
int bs(ll a, ll b, const vpii &S) {
int ok = sz(S);
int ng = -1;
auto check = [&](int s) -> bool {
ll c = S[s].A;
ll d = S[s].B;
return a*(c+d)+c*(a+b) > (a+b)*(c+d);
};
while (abs(ok - ng) > 1) {
int mid = (ok + ng) / 2;
bool c = check(mid);
// cout << "ok: " << ok << ", ng: " << ng << ", ";
// cout << "check(" << mid << ") -> " << c << endl;
if (c) ok = mid;
else ng = mid;
}
return sz(S) - ok;
}
void Main() {
int n = read<int>();
vpii R[3];
rep(i, n) {
int t = read<int>();
int a = read<int>();
int b = read<int>();
int g = __gcd(a, b);
a /= g;
b /= g;
R[t].emplace_back(a, b);
}
rep(i, 3) sort(all(R[i]), cmp_b);
//rep(ii,3) { cout << "R["<<ii<<"]:"; rep(jj, sz(R[ii])) cout << ' ' << R[ii][jj]; cout << endl; }
ll ans = 1 + n;
forr(ab, R[1]) {
int a = ab.A;
int b = ab.B;
int c0 = bs(a, b, R[0]);
//_p("R1: a:%d, b:%d, c0: %d\n", a, b, c0);
ans += c0;
}
forr(ab, R[2]) {
ll a = ab.A;
ll b = ab.B;
int c0 = bs(a, b, R[0]);
int c1 = bs(a, b, R[1]);
//_p("R2: a:%lld, b:%lld, c0: %d, c1: %d\n", a, b, c0, c1);
ans += c0;
ans += c1;
}
// R[0] と R[1] O(N^2)
vd X;
vector<rational> Y;
{
forr(ab, R[0]) {
ll a = ab.A;
ll b = ab.B;
forr(cd, R[1]) {
ll c = cd.A;
ll d = cd.B;
if (a*(c+d) + c*(a+b) >= (a+b)*(c+d)) {
if (cmp(a, a+b, c, c+d) <= 0) {
X.emplace_back(1.0 * a / (a + b));
}
else {
X.emplace_back(1.0 * c / (c + d));
}
{
ll e = (a+b)*d + (c+d)*b;
ll f = (a+b)*c - (c+d)*b;
if (f > 0) {
rational ef(e);
ef /= f;
Y.emplace_back(ef);
}
}
}
}
}
}
// O(N^2 log N^2) TLE?
sort(all(X));
sort(all(Y));
//cout << "X:"; rep(ii,sz(X)) cout << ' ' << X[ii]; cout << endl;
// 3本
// O(n * log(N^2))
forr(ab, R[2]) {
ll a = ab.A;
ll b = ab.B;
double bab = 1.0 * b / (a + b);
// b/(a+b) 以上の X を数える
// X は単調増加
// OK な下限を探す
int ok = sz(X);
int ng = -1;
while (abs(ok - ng) > 1) {
int mid = (ok + ng) / 2;
bool c = X[mid] >= bab;
// cout << "ok: " << ok << ", ng: " << ng << ", ";
// cout << "check(" << mid << ") -> " << c << endl;
if (c) ok = mid;
else ng = mid;
}
//cout << "ok: "<<ok << endl;
ans += sz(X) - ok;
// 交点に重なる場合を除く
rational a_b(a);
a_b /= b;
ans -= upper_bound(all(Y), a_b) - lower_bound(all(Y), a_b);
}
cout << ans << endl;
}
int main() { cin.tie(nullptr); ios::sync_with_stdio(false); Main(); return 0; }
しらっ亭