1
x = int(input())
2
########## Begin ##########
3
L = [int(xi) for xi in str(x)]
4
result = 0
5
if x<100:
6
    print('False')
7
else:
8
    for i in L:
9
        result += i**3
10
    if result == x:
11
        print('True')
12
    else:
13
        print('False')
14
########## End ##########

1
n = int(input())
2
result = []
3
if n==1:
4
    begin = 0
5
else:
6
    begin = 10**(n-1)
7
end = 10**n
8
for i in range(begin,end):
9
    L = [int(xi) for xi in str(i)]
10
    sum = 0
11
    for j in L:
12
        sum += j**n
13
    if sum == i:
14
        result.append(i)
15
for i in result:
16
    print(i)

1
import matplotlib.pyplot as plt
2
########## Begin ##########
3
from math import *
4
import numpy as np
5
X=np.linspace(-3,3,21)
6
Y=[]
7
for x in X:
8
    y = exp(-(x**2)/2) / sqrt(2*pi)
9
    Y.append(y)
10
########## End ##########
11

12
#以下代码用于打印结果
13
for i in range(len(X)):
14
    if round(X[i],2)==-0.0:
15
        X[i]=0
16
    print('%.2f\t%.2f' % (X[i],Y[i]))
17

18
#以下代码用于绘制图形
19
plt.plot(X,Y,'bo-')
20
plt.grid('on')
21
plt.axis([-3, 3, 0, 0.4])
22
plt.show()
23
plt.savefig( 'src/step6/student/pic.png' )
24
plt.close()

1
import matplotlib.pyplot as plt
2

3
########## Begin ##########
4
from math import *
5
import numpy as np
6
X=[]
7
Y=[]
8
for x in range(-1200,1201,200):
9
    X.append(x)
10
for x in X:
11
    y = -(2.5+0.11*sqrt((10*abs(x)/50)))
12
    Y.append(y)
13
########## End ##########
14

15
#以下代码用于打印结果
16
for i in range(len(X)):
17
    print('%5s\t%.2f' % (int(X[i]),Y[i]))
18

19
#以下代码用于绘制图形
20
plt.plot(X,Y,'r-')
21
plt.grid('off')
22
plt.axis([-1200, 1200, -4.2, 0])
23
plt.show()
24
plt.savefig( 'src/step6/student/pic.png' )
25
plt.close()
26

27
#以下代码用于保存图片
28
plt.savefig( 'src/step7/student/pic.png' )
29
plt.close()

1
import matplotlib.pyplot as plt
2
X = [0,  0.5,   1,   1.5,   2,  2.5,   3,   4,  4.5,    5]
3
Y = [0,   18,  20,  39.5,  60,   50,  68,  77,  100,  110]
4
########## Begin ##########
5
k,b,xk,yk,xk2,xkyk=0,0,0,0,0,0
6
n=len(X)
7
for x,y in zip(X,Y):
8
    xk+=x
9
    yk+=y
10
    xk2+=x**2
11
    xkyk+=x*y
12
k=(xk*yk-n*xkyk)/(xk**2-n*xk2)
13
b=(xk*xkyk-xk2*yk)/(xk**2-n*xk2)
14
X1=[0,5]
15
Y1=[b,k*5+b]
16
#画图
17
plt.plot(X,Y,'bo')
18
plt.plot(X1,Y1,'r-')
19
plt.show()
20
plt.savefig( 'src/step8/student/pic.png' )
21
########## End ##########
22
print('y = %.3fx + %.3f' % (k,b))
23
plt.savefig( 'src/step8/student/pic.png' )
24
plt.close()