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Source: hdoj 1700 Mathematical Proof] If R is the circle radius, A, B, and C are the angles of triangles, A/Sina = B/sinb = C/sinc = 2R is obtained from the sine theorem.Therefore, A + B + C = 2R (SINA + sinb + sinc). When r determines that the circumference A + B + C is the largest, the sum is the maximum of SINA + sinb + sinc.Set y = SINA + sinb + sinc, first fixed angle,Y = SINA + sinb + sinc = SINA + 2sin (B + C)/2) Cos (B-C)/2)= SINA + 2cos (A/2) Cos (B-C)/2)Because a is a fixed value, onl

, (i*i*i*28+i*8+i*i-232)%240,1,1);//Beautiful stars}}}}Class box//Bar Column{Privateint X1;int h;BOOL Highlight;BOOL Flag;Publicvoid Setflag (bool n) {flag=n;}BOOL Getflag () {return flag;}void Sethighlight (int b) {highlight=b;}BOOL Gethighlight () {return highlight;}int getx1 () {return x1;}int Geth () {return h;}void setx1 (int a) {x1=a;}void Seth (int b) {h=b

]]=1;hol[a[3][0]][a[3][1]]=1;y=2;x=5;Do{Randomize ();Ty1=random (100);ty1%=7;if (ty1==0)ty1=7;}while (ty==ty1);Ty=ty1;j=0;Xiao ();}Else{Block (0);y++;}for (i=0;iif (hol[i][0]==1){Cycy=1;Getch ();Break}if (cycy==1){cycy=0;Break}}while (b!=13);Getch ();Closegraph ();Save ();Getch ();}void unit (char x,char Y,char color){Setfillstyle (1,color);SetColor (color);Bar (200+x*15,10+y*15,200+ (x+1) *15-2,10+ (y+1) *15-2);}void block (char color){Char i,t;for (i=0;iUnit (A[i][0],a[i][1],color);}void DL (i

Finding the root x^3-5x^2+16x-80=0 of a three-order equation by using the chord-truncation method#include #include float f (float x)//define sub-function f (x) = X^3-5x^2+16x-80, when f (x) →0, then x is the real number root of the request;{Float y;Y= ((x-5.0) *x+16.0) *x-80.0;return (y); Returns the value of f (x)}Float Xpoint (float x1,float x2)//define sub-function Xpoint to find the x0 value of the intersection of the chord and the x-axis;{float x

value of O '. The input 1th behaves as an integer n (1 Lines 2nd through 9th each Act 8 non-negative integers less than 100, indicating the score of the corresponding lattice on the board. Each row is separated by a space between two adjacent numbers. Output is only one number, which is O ' (rounded to three digits after the decimal point).Sample Input31 1 1 1 1 1 1 31 1 1 1 1 1 1 11 1 1 1 1 1 1 11 1 1 1 1 1 1 11 1 1 1 1 1 1 11 1 1 1 1 1 1 11 1 1 1 1 1 1 01 1 1 1 1 1 0 3Sample Output1.633Exerci

Uva_11192 If these operations are performed on a one-dimensional sequence, then the line segment tree can be used. But now the question expands these operations to two-dimensional, recalling that the essence of the Line Segment tree is a binary line segment, then for a two-dimensional matrix, expansion should be a quartile matrix. # Include # Include String . H> # Include # Define Maxd 1000010 # Define INF 0x3f3f3f Int N, M, P, node; Struct Segtree { Int

become the initial point of the second time slice, then on the second time slice on the C point and the new target point to construct a triangle to calculate the new VT, and then into the third time slice, so repeated.Assuming the coordinates of the initial state of the missile and the target are (x1,y1), (x, y), constructs the right triangle Abe, which is used to seek the sine and cosine of the ∠a, because the VT is set by itself, we need to calcula

Note: This tutorial is I try to use scikit-learn some experience, Scikit-learn really super easy to get started, simple and practical. 30 minutes learning to call the basic regression method and the integration method should be enough.This article mainly refers to the official website of Scikit-learn.Preface: This tutorial mainly uses the most basic function of numpy, used to generate data, matplotlib used for drawing, Scikit-learn is used to call machine learning method. If you're not familiar

Nested calls to C + + functionsC + + does not allow nested definitions of functions, that is, you cannot fully include another function in one function. The definition of each function in a program is parallel and independent. Although C + + cannot nest definition functions, you can nest call functions, that is, when you call a function, another function is called. When implementing a function nesting call in a program, it should be noted that before calling a function, you need to declare eac

In the previous section, we talked about how to find the path. During discussions with friends, we were not very right. We went a long way. In fact, the code is mainly about determining the direction, for example, the target is on the top right, it should be right first or first, but it will not be processed. If this is done, the effect will be better, but it will inevitably lead to detours. Greedy is like this, not optimal, close to optimal. I also hope that other students will have some commen

= imagecolorallocate ($ this-> image, 236,236,236 );$ Dial_color = imagecolorallocate ($ this-> image, 131,131,131 );$ X1 = $ paddingLeft;$ Y1 = $ paddingTop;$ X2 = $ img_w-$ paddingRight;$ Y2 = $ img_h-$ paddingBottom;Imagerectangle ($ this-> image, $ x1, $ y1, $ x2, $ y2, $ border_color );Imagefilledpolygon ($ this-> image, array ($ x1-5, $ y1 + 10, $

The study of iterative methodIterative method is a common algorithm design method for solving the approximate root of equations or equations. Set the equation to f (x) = 0, use a mathematical method to derive the equivalent form x=g (x), and then follow these steps:(1) Select an approximate root of the equation and assign it to the variable x0;(2) The value of x0 is stored in the variable x1, then g (x1) is

0.00001 POW (10,-5) 1e-5 ///////////////////////////////////////// # Include # Include Void main () {Double A, x1, x2; Printf ("input a value :"); Scanf ("% lf", ); X1 = A/2; X2 = (X1 + A/X1)/2; For (; FABS (x2-x1)> = 0.00001 ;) { X1