百度之星2021 决赛

Posted 2022-11-23 nike0good

A

解方程得出系数

#include<cstdio>
#include<cstring>
#include<cstdlib>
#include<algorithm>
#include<functional>
#include<iostream>
#include<cmath>
#include<cctype>
#include<ctime>
using namespace std;
#define For(i,n) for(int i=1;i<=n;i++)
#define Fork(i,k,n) for(int i=k;i<=n;i++)
#define ForkD(i,k,n) for(int i=n;i>=k;i--)
#define Rep(i,n) for(int i=0;i<n;i++)
#define ForD(i,n) for(int i=n;i;i--)
#define RepD(i,n) for(int i=n;i>=0;i--)
#define Forp(x) for(int p=pre[x];p;p=next[p])
#define Forpiter(x) for(int &p=iter[x];p;p=next[p])  
#define Lson (x<<1)
#define Rson ((x<<1)+1)
#define MEM(a) memset(a,0,sizeof(a));
#define MEMI(a) memset(a,127,sizeof(a));
#define MEMi(a) memset(a,128,sizeof(a));
#define INF (2139062143)
#define F (998244353)
#define eps (1e-3)
#define MAXN (1000+10)
typedef __int64 ll;
ll mul(ll a,ll b)return (a*b)%F;
ll add(ll a,ll b)return (a+b)%F;
ll sub(ll a,ll b)return (a-b+llabs(a-b)/F*F+F)%F;
void upd(ll &a,ll b)a=(a%F+b%F)%F;

typedef double Matrix[MAXN][MAXN];

Matrix A,B;
double w[10]=-0.8817456221,
4.2129304928,
-1.9039237464,
2.1274063603;
int main()

	freopen("Question_1_traindata.txt","r",stdin);
	freopen("answwer1.txt","w",stdout);
	int n=100;
	int m=5;
	Rep(i,n) 
		double c=0;
		Rep(j,5) 
			cin>>A[i][j];//cout<<A[i][j]<<endl;
			c+=A[i][j]*w[j];
		
		printf("%.4lf\\n",c);
	
	
	return 0;

B

找规律，发现所有星星移动均为椭圆运动，且每36帧一循环。

#include<bits/stdc++.h> 
using namespace std;
#define For(i,n) for(int i=1;i<=n;i++)
#define Fork(i,k,n) for(int i=k;i<=n;i++)
#define ForkD(i,k,n) for(int i=n;i>=k;i--)
#define Rep(i,n) for(int i=0;i<n;i++)
#define ForD(i,n) for(int i=n;i;i--)
#define RepD(i,n) for(int i=n;i>=0;i--)
#define Forp(x) for(int p=pre[x];p;p=next[p])
#define Forpiter(x) for(int &p=iter[x];p;p=next[p])  
#define Lson (o<<1)
#define Rson ((o<<1)+1)
#define MEM(a) memset(a,0,sizeof(a));
#define MEMI(a) memset(a,0x3f,sizeof(a));
#define MEMi(a) memset(a,128,sizeof(a));
#define MEMx(a,b) memset(a,b,sizeof(a));
#define INF (0x3f3f3f3f)
#define F (1000000007)
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define vi vector<int> 
#define pi pair<int,int>
#define SI(a) ((a).size())
#define Pr(kcase,ans) printf("Case #%d: %lld\\n",kcase,ans);
#define PRi(a,n) For(i,n-1) cout<<a[i]<<' '; cout<<a[n]<<endl;
#define PRi2D(a,n,m) For(i,n)  \\
						For(j,m-1) cout<<a[i][j]<<' ';\\
						cout<<a[i][m]<<endl; \\
						 
#pragma comment(linker, "/STACK:102400000,102400000")
#define ALL(x) (x).begin(),(x).end()
#define gmax(a,b) a=max(a,b);
#define gmin(a,b) a=min(a,b);
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
ll mul(ll a,ll b)return (a*b)%F;
ll add(ll a,ll b)return (a+b)%F;
ll sub(ll a,ll b)return ((a-b)%F+F)%F;
void upd(ll &a,ll b)a=(a%F+b%F)%F;
inline int read()

	int x=0,f=1; char ch=getchar();
	while(!isdigit(ch)) if (ch=='-') f=-1; ch=getchar();
	while(isdigit(ch))  x=x*10+ch-'0'; ch=getchar();
	return x*f;
 
double a[200][400][5];
int k[200];
bool rgn(double p) 
	return p>=0&&p<=5000;

int main()

	freopen("Question_2_data.txt","r",stdin);
	freopen("Question_2_result.txt","w",stdout);
	
	int n;
	int gn=0,gk=0;
	int c=0;
	int T=60;
	while(scanf("%d",&n)==1 && T--) 
		For(i,n) 
			k[i]=read();
			For(j,k[i]) 
				Rep(l,4)
					scanf("%lf",&a[i][j][l]);
				
				a[i][j][4]=(a[i][j][2]-a[i][j][0])*(a[i][j][3]-a[i][j][1]);
			
			
		
		for(int i=n+1;i<=n+10;i++) 
			int p=max(i-36,1);
			cout<<k[p];
			For(j,k[p]) 
				Rep(l,4)
					printf(" %.10lf",a[p][j][l]);
				
			
			puts("");
		
	
	
	return 0;