python

PY01004 - NGUYÊN TỐ.py

@@ -0,0 +1,17 @@
+from math import gcd
+from math import sqrt
+
+def prime(n):
+    if n < 2: return False
+    for i in range(2,int(sqrt(n))+1):
+        if n%i == 0: return False   
+    return True
+
+test = int(input())
+for i in range(test):
+    k = 0
+    n = int(input())
+    for i in range(n):
+        if gcd(n,i) == 1: k=k+1
+    if(prime(k)): print("YES")
+    else: print("NO")

PY01005 - SỐ MAY MẮN.py

@@ -0,0 +1,6 @@
+n = input()
+cnt = 0
+for i in n:
+    if i=='4' or i == '7': cnt = cnt+1
+if cnt == 4 or cnt == 7: print("YES")
+else: print("NO") 

PY01006 - SỐ MAY MẮN - 2.py

@@ -0,0 +1,9 @@
+def lucky(n):
+    for i in n:
+        if i != '4' and i != '7': return "NO"
+    return "YES"
+test = int(input())
+for i in range(test):
+    n = input()
+    print(lucky(n))
+

PY01007 - LÃI SUẤT NGÂN HÀNG.py

@@ -0,0 +1,5 @@
+from math import log
+test = int(input())
+for i in range(test):
+    n,x,m = [ float(x) for x in input().split() ]
+    print(int(log( m/n, 1 + x/100 )) + 1 )

PY01008 - CHUYỂN THÀNH CHỮ HOA.py

@@ -0,0 +1,2 @@
+s = input()
+print(s.upper())

PY01009 - CHỮ HOA – CHỮ THƯỜNG.py

@@ -0,0 +1,8 @@
+s = input()
+hoa = 0
+thuong = 0
+for i in s:
+    if i <= 'z' and i >= 'a': thuong +=1
+    else: hoa +=1
+if hoa > thuong: print(s.upper()) 
+else: print(s.lower())

PY01010 - ĐẦU CUỐI.py

@@ -0,0 +1,8 @@
+def check(n):
+    if(n[0]==n[-2] and n[1]==n[-1]): return "YES"
+    return "NO"
+test = int(input())
+for i in range(test):
+    s = input()
+    print(check(s))
+

PY01013 - ƯỚC SỐ CHUNG NGUYÊN TỐ.py

@@ -0,0 +1,18 @@
+from math import gcd
+from math import sqrt
+def phan_tich(x):
+    tong = 0
+    while x != 0:
+        tong += x%10
+        x = int(x/10)
+    return tong
+def prime(x):
+    if x < 2: return "NO"
+    else:
+        for i in range(2,int(sqrt(x))+1):
+            if x%i == 0: return "NO"
+    return "YES"
+t = int(input())
+for _ in range(t):
+    x,y = [int(a) for a in input().split()]
+    print(prime(phan_tich(gcd(x,y))))

PY01014 - CHIA HẾT CHO K.py

@@ -0,0 +1,9 @@
+a,k,n = [int(x) for x in input().split()]
+i = 1
+ok = 1
+while k*i <=n:
+    if k*i - a > 0 :
+        ok = 0
+        print(k*i - a,end = ' ')
+    i+=1 
+if ok: print(-1)

PY01015 - SỐ KHÔNG GIẢM.py

@@ -0,0 +1,8 @@
+t = int(input())
+def check(s):
+    for i in range(len(s) - 1):
+        if s[i] > s[i+1]: return "NO"
+    return "YES"
+for i in range(t):
+    s = input()
+    print(check(s))

PY01016 - GIẢI MÃ.py

@@ -0,0 +1,6 @@
+t = int(input())
+for _ in range(t):
+    s = input()
+    for i in range(len(s)-1):
+        if i%2 == 0: print(s[i]*int(s[i+1]),end='')
+    print()

PY01017 - MÃ HÓA 1.py

@@ -0,0 +1,13 @@
+t = int(input())
+for _ in range(t):
+    s = input()
+    cnt = 1
+    for i in range(len(s)-1):
+        if s[i] == s[i+1]: 
+            cnt +=1
+        else: 
+            print(cnt,end='')
+            print(s[i],end='')
+            cnt = 1
+    print(cnt,end='')
+    print(s[-1])

PY01019 - KHOẢNG CÁCH KÝ TỰ.py

@@ -0,0 +1,9 @@
+t = int(input())
+def check(s):
+    a = s[::-1]
+    for i in range(1,len(s)):
+        if abs(ord(s[i])-ord(s[i-1])) != abs(ord(a[i])-ord(a[i-1])): return "NO"
+    return "YES"
+for _ in range(t):
+    s = input()
+    print(check(s))

PY01020 - SỐ PHÁT LỘC.py

@@ -0,0 +1,8 @@
+def check(s):
+    if len(s) < 2: return "NO"
+    if s[-1] == '6' and s[-2] == '8': return "YES"
+    return "NO"
+t = int(input())
+for _ in range(t):
+    s = input()
+    print(check(s))

PY01024 - CHẴN - LẺ.py

@@ -0,0 +1,16 @@
+def check1(s):
+    tong = 0
+    for i in s:
+        tong += int(i)   
+    if tong%10 == 0: return True
+    return False
+
+def check2(s):
+    for i in range(len(s)-1):
+        if abs(int(s[i])-int(s[i+1])) !=2: return False
+    return True
+t = int(input())
+for _ in range(t):
+    s = input()
+    if check1(s) and check2(s): print("YES")
+    else: print("NO")

PY01028 - TÁCH TỪ.py

@@ -0,0 +1,2 @@
+for i in input().split():
+    print(i)

PY01029 - SỐ ĐẢO NGUYÊN TỐ CÙNG NHAU.py

@@ -0,0 +1,7 @@
+from math import gcd
+t = int(input())
+for i in range(t):
+    s = input()
+    s1 = s[::-1] 
+    if gcd(int(s),int(s1)) == 1: print("YES")
+    else: print("NO")

PY01030 - NGUYÊN TỐ CÙNG NHAU.py

@@ -0,0 +1,8 @@
+from math import gcd
+n,k = [int(x) for x in input().split()]
+cnt = 0
+for i in range(10**(k-1),10**k):
+    if gcd(n,i) ==1:
+        print(i,end =' ')
+        cnt +=1
+        if cnt %10 == 0: print()

PY01036 - TÍNH TỔNG PHÂN THỨC.py

@@ -0,0 +1,9 @@
+t = int(input())
+for i in range(t):
+    a = int(input())
+    s = 0
+    k = 1 
+    if a % 2 == 0: k = 2
+    for i in range(k,a+1,2):
+        s += 1/i
+    print("{:.6f}".format(s))

PY01038 - KIỂM TRA CHIA HẾT CHO 7.py

@@ -0,0 +1,9 @@
+t = int(input())
+for i in range(t):
+    n = input()
+    while int(n) % 7 != 0:
+        n1 = str(n)[::-1]
+        n = int(n) + int (n1)
+        n = str(n)
+    print(n)
+

PY01039 - KIỂM TRA SỐ ĐẸP.py

@@ -0,0 +1,20 @@
+def check(n):
+    a = n[0]
+    b = n[1]
+    if a == b: return "NO"
+    if len(n) % 2 == 0:
+        for i in range(2,len(n)-1,2):
+            if n[i] != a: return "NO"
+        for i in range(3,len(n),2):
+            if n[i] != b: return "NO"
+    else: 
+        for i in range(2,len(n),2):
+            if n[i] != a: return "NO"
+        for i in range(3,len(n)-1,2):
+            if n[i] != b: return "NO"
+    return "YES"
+
+test = int(input())
+for i in range(test):
+    n = input()
+    print(check(n))

PY01042 - KIỂM TRA HỆ CƠ SỐ 3.py

@@ -0,0 +1,8 @@
+def check(s):
+    for i in s:
+        if i > '3' or i < '0': return "NO"
+    return "YES"
+test = int(input())
+for i in range(test):
+    s = input()
+    print(check(s))

PY01045 - XÂU PALINDROME.py

@@ -0,0 +1,2 @@
+s = input()
+print(len(s)-1)

PY01047 - KIỂM TRA NGUYÊN TỐ.py

@@ -0,0 +1,13 @@
+from math import sqrt
+def prime(s):
+    if s < 2 : return False
+    for i in range(2,int(sqrt(s))+1):
+        if s % i == 0: return False
+    return True
+t = int(input())
+for i in range(t): 
+    s = input()
+    a =""
+    a += s[-4] + s[-3] + s[-2] + s[-1]
+    if prime(int(a)): print("YES")
+    else: print("NO") 

PY01049 - CHỮ SỐ NGUYÊN TỐ.py

@@ -0,0 +1,20 @@
+from math import sqrt
+def prime(s):
+    if s < 2 : return False
+    for i in range(2,int(sqrt(s))+1):
+        if s % i == 0: return False
+    return True
+def check1(s):
+    if prime(len(s)): return True
+    return False
+def check2(s):
+    cnt = 0
+    for i in s:
+        if prime(int(i)): cnt += 1
+    if cnt > len(s) - cnt: return True
+    return False     
+t = int(input())
+for i in range(t): 
+    s = input()
+    if check1(s) and check2(s): print("YES")
+    else: print("NO")

PY01053 - SỐ CHIA HẾT CHO 3.py

@@ -0,0 +1,5 @@
+t = int(input())
+for i in range(t):
+    a = int(input())
+    if a % 3 == 0: print("YES")
+    else: print("NO")