Submission #1519029

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Source Code Expand

import math,string,itertools,fractions,heapq,collections,re,array,bisect,sys,random,time,copy,functools

sys.setrecursionlimit(10**7)
inf = 10**20
gosa = 1.0 / 10**10
mod = 10**9 + 7

def LI(): return [int(x) for x in sys.stdin.readline().split()]
def LI_(): return [int(x)-1 for x in sys.stdin.readline().split()]
def LF(): return [float(x) for x in sys.stdin.readline().split()]
def LS(): return sys.stdin.readline().split()
def I(): return int(sys.stdin.readline())
def F(): return float(sys.stdin.readline())
def S(): return input()

def main():
    n = I()
    s = S()
    i = 0
    r = 0
    while i < n-3:
        if s[i+3] == '.':
            i += 3
        elif s[i+2] == '.':
            i += 2
        elif s[i+1] == '.':
            i += 1
        else:
            r += 1
            i += 3

    if s[-1] == 'X':
        r += 1

    return r

print(main())

Submission Info

Judge Result