【BZOJ 1024】[SCOI2009] 生日快乐


然而似乎直接暴搜也可以过 (╯‵□′)╯︵┻━┻

#define LL long long
#define abs(x) ((x)<0?-(x):(x))
using namespace std;

const double INF = 1e9;
const double EPS = 1e-3;

struct Data{
	double x,y,val;
	inline Data() {}
	inline Data(double x, double y, double val):x(x),y(y),val(val) {
		if (x < y) swap(x, y);
	inline bool operator < (const Data &tmp) const {
		if (abs(tmp.x - x) < EPS && abs(tmp.y - y) < EPS) return 0;
		else if (tmp.x - x > EPS) return 1;
		else if (x - tmp.x > EPS) return 0;
		else if (tmp.y - y > EPS) return 1;
		else return 0;  
set<Data> S;
set<Data>::iterator itr;

inline int read(){
	char c=getchar(); int ret=0,f=1;
	while (c<'0'||c>'9') {if(c=='-')f=-1;c=getchar();}
	while (c<='9'&&c>='0') {ret=ret*10+c-'0';c=getchar();}
	return ret*f;

double DFS(double x, double y, int n) {
	if (n == 1) {
		if (x < y) swap(x, y);
		return x / y; 
	} else {
		itr = S.find(Data(x,y,0));
		if (itr != S.end()) return itr->val;
		else {
			double ret = INF;
			for (int i=1;i*2<=n;i++) {
				ret = min(ret, max(DFS(x*i/n,y,i), DFS(x*(n-i)/n,y,n-i)));
				ret = min(ret, max(DFS(x,y*i/n,i), DFS(x,y*(n-i)/n,n-i)));
			return ret;

int main(){
	int x=read(),y=read(),n=read();
	return 0;

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