結果
| 問題 |
No.461 三角形はいくつ?
|
| コンテスト | |
| ユーザー |
rickytheta
|
| 提出日時 | 2016-12-12 00:44:58 |
| 言語 | C++11(廃止可能性あり) (gcc 13.3.0) |
| 結果 |
AC
|
| 実行時間 | 218 ms / 5,000 ms |
| コード長 | 2,187 bytes |
| コンパイル時間 | 1,479 ms |
| コンパイル使用メモリ | 172,900 KB |
| 実行使用メモリ | 6,820 KB |
| 最終ジャッジ日時 | 2024-11-29 04:26:16 |
| 合計ジャッジ時間 | 6,164 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 41 |
コンパイルメッセージ
main.cpp: In function ‘int main()’:
main.cpp:62:8: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
62 | scanf("%d",&n);
| ~~~~~^~~~~~~~~
main.cpp:65:10: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
65 | scanf("%d%d%d",&p,&a,&b);
| ~~~~~^~~~~~~~~~~~~~~~~~~
ソースコード
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef int _loop_int;
#define REP(i,n) for(_loop_int i=0;i<(_loop_int)(n);++i)
#define FOR(i,a,b) for(_loop_int i=(_loop_int)(a);i<(_loop_int)(b);++i)
#define FORR(i,a,b) for(_loop_int i=(_loop_int)(b)-1;i>=(_loop_int)(a);--i)
#define DEBUG(x) cout<<#x<<": "<<x<<endl
#define DEBUG_VEC(v) cout<<#v<<":";REP(i,v.size())cout<<" "<<v[i];cout<<endl
#define ALL(a) (a).begin(),(a).end()
#define CHMIN(a,b) a=min((a),(b))
#define CHMAX(a,b) a=max((a),(b))
// mod
const ll MOD = 1000000007ll;
#define FIX(a) ((a)%MOD+MOD)%MOD
// floating
typedef double Real;
const Real EPS = 1e-11;
#define EQ0(x) (abs(x)<EPS)
#define EQ(a,b) (abs(a-b)<EPS)
typedef complex<Real> P;
class Ratio{
public:
ll x,y;
Ratio(){}
Ratio(ll x,ll y):x(x),y(y){
ll g = __gcd(x,y);
x/=g; y/=g;
}
Ratio operator+(const Ratio &that) const {
return Ratio(this->x*that.y + that.x*this->y, this->y*that.y);
}
Ratio operator-(const Ratio &that) const {
return Ratio(this->x*that.y - that.x*this->y, this->y*that.y);
}
bool operator<(const Ratio &that) const {
return (ll)this->x * that.y < (ll)this->y * that.x;
}
bool operator>(const Ratio &that) const {
return (ll)this->x * that.y > (ll)this->y * that.x;
}
};
int n;
Ratio one(1,1);
Ratio zero(0,1);
set<Ratio> yo[3];
int main(){
scanf("%d",&n);
REP(i,n){
int p,a,b;
scanf("%d%d%d",&p,&a,&b);
yo[p].insert(Ratio(a,a+b));
}
REP(p,3)yo[p].insert(one);
map<Ratio,int> rui;
int it = 0;
rui[Ratio(-1e9,1)] = it++;
for(auto a:yo[0]){
rui[a] = it++;
}
rui[Ratio(1e9,1)] = it++;
ll ans = 0;
for(auto a1:yo[1])for(auto a2:yo[2]){
Ratio b1 = one-a1;
Ratio b2 = one-a2;
if(one - a2 > a1)continue;
Ratio high = one, low = max(b1,b2);
ll add = 0;
auto it = rui.upper_bound(high);it--;
add += it->second;
it = rui.lower_bound(low); it--;
add -= it->second;
ans += add;
// banned
if(rui.count(one-(a1-b2))){
ans --;
}
}
printf("%lld\n",ans);
return 0;
}
rickytheta