Solving One Coding Challenge at a Time: My Codeforces Experience

w = int(input())
 
if w > 2 and w % 2 == 0:
    print("YES")
else:
    print("NO")

n = int(input())
 
for _ in range(n):
    w = input().strip()
 
    if len(w) > 10:
        first_letter = w[0]
        letters_between = len(w[1:-1])
        last_letter = w[-1]
        print(first_letter + str(letters_between) + last_letter)
    else:
        print(w)

n = int(input())
 
solutions = 0
 
for _ in range(n):
    votes = list(map(int,input().split()))
    # input() → "1 0 1" (a single string)
    # split() → ["1", "0", "1"] (list of strings)
    # map(int, ...) → 1, 0, 1 <iterator> producing integers
    # list(...) → [1, 0, 1] (list of integers)
    consensus = 0
    for v in votes:
        if v:
            consensus += 1
    if consensus > 1:
        solutions += 1
 
print(solutions)

n = int(input())	# 1 <= n <= 150
 
result = 0
 
for _ in range(n):
	character = input()
	match character[0]:
		case "X":
			if character[1] == "+":
				result += 1
			else:
				result -= 1
		case "+":
			result += 1
		case "-":
			result -= 1
 
print(result)

nk = input().split()
n = int(nk[0])
k = int(nk[1])
 
# better alternative: n, k = map(int, input().split())
 
scores = list(map(int, input().split()))
kth_score = scores[k-1]
 
i = 0
 
for score in scores:
	if score < kth_score or score == 0:
		break
	i += 1
 
print(i)

h, w = map(int, input().split())
 
squares = h * w
 
print(int(squares / 2))

matrix = []
 
one_position = tuple()
 
swaps = 0
 
for row in range(5):
	matrix.append( list( map( int, input().split() ) ) )
	for column in range(5):
		if matrix[row][column] == 1:
			one_position = (column, row)
 
swaps = abs(one_position[0] - 2) + abs(one_position[1] - 2)
 
print(swaps)

numbers = list( map( int, input().split("+") ) )
 
swaps = -1
 
while(swaps != 0):
	swaps = 0
	for i in range(len(numbers)-1):
		if numbers[i] > numbers[i+1]:
			aux = numbers[i]
			numbers[i] = numbers[i+1]
			numbers[i+1] = aux
			swaps += 1
 
result = "+".join(list(map(str,numbers)))
 
print(result)

cost, dollars, bananas = map( int, input().split() )
 
total = 0
borrow = 0
 
for i in range(1, bananas + 1):
	total += cost * i
 
if(total > dollars):
	borrow = total - dollars
 
print(borrow)