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Submission #83622

# Submission time Handle Problem Language Result Execution time Memory
83622 2018-11-09T13:45:46 Z charlies_moo Mate (COCI18_mate) PyPy
0 / 100
 2000 ms 21232 KB 
s = raw_input()
q = input()


def combination(n, d):
    k = d - 2
    if n - k < k:
        k = n - k
    result = 1
    for i in range(k):
        result *= n
        n -= 1
    w = k
    for i in range(w):
        result /= k
        k -= 1
    return result


def mod(num):
    return num % (10**9+7)


def lst_id(letter):
    return ord(letter) - ord("a")


try:

    arr = [[0 for i in range(26)] for i in range(len(s))]
    arr_c = [0 for i in range(26)]


except:
    print -1

    for i in range(len(s)-1, -1, -1):
        for j in range(26):
            arr[i][j] = arr_c[j]
        arr_c[lst_id(s[i])] += 1



arr_r = []
for i in range(q):
    d, xy = raw_input().split()
    total = 0
    d = int(d)
    x = xy[0]
    y = xy[1]
    for i in range(len(s)):
        if s[i] == x and i >= d - 2:
            total += combination(i, d) * arr[i][lst_id(y)]
    arr_r.append(mod(total))

for ans in arr_r:
    print ans

Subtask #1
0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 202 ms 16864 KB Output isn't correct
2 Incorrect 164 ms 16864 KB Output isn't correct
3 Incorrect 175 ms 16864 KB Output isn't correct
4 Incorrect 190 ms 18524 KB Output isn't correct
5 Execution timed out 2039 ms 20384 KB Time limit exceeded
6 Execution timed out 2055 ms 21232 KB Time limit exceeded
7 Execution timed out 2060 ms 21232 KB Time limit exceeded
8 Execution timed out 2041 ms 21232 KB Time limit exceeded
9 Execution timed out 2056 ms 21232 KB Time limit exceeded
10 Execution timed out 2055 ms 21232 KB Time limit exceeded