Buggy python submission (verdict: Time Limit Exceeded):
import sys
read = sys.stdin.read
readlines = sys.stdin.readlines
from collections import defaultdict
def main():
    n = int(input())
    s = tuple(map(int, tuple(input())))
    num_pos = [] # 各数字がｓ中に最後にあらわれる位置。
    for num in range(10):
        if num in s:
            num_pos.append(n - s[::-1].index(num) - 1)
    unique_num = [0] * n # ｓの各桁でその桁以降にある数字の種類。
    for i1 in range(n):
        unique_num[i1] = sum([np >= i1 for np in num_pos])
    d1 = defaultdict(int)
    for keta1 in range(n - 2):
        for keta2 in range(keta1 + 1, n - 1):
            if not d1[(s[keta1], s[keta2])]:
                d1[(s[keta1], s[keta2])] = unique_num[keta2 + 1]
    r = sum(d1.values())
    print(r)

if __name__ == '__main__':
    main()

Fixed submission:
import sys
read = sys.stdin.read
readlines = sys.stdin.readlines
#from collections import defaultdict
def main():
    n = int(input())
    s = tuple(map(int, tuple(input())))
    num_pos = [] # 各数字がｓ中に最後にあらわれる位置。
    for num in range(10):
        if num in s:
            num_pos.append(n - s[::-1].index(num) - 1)
    unique_num = [0] * n # ｓの各桁でその桁以降にある数字の種類。
    for i1 in range(n):
        unique_num[i1] = sum([np >= i1 for np in num_pos])
    unique_num.append(0)
    r = 0
    for keta1 in range(10):
        if keta1 in s:
            keta1_pos = s.index(keta1)
            for keta2 in range(10):
                if keta2 in s[keta1_pos + 1:]:
                    keta2_pos = s[keta1_pos + 1:].index(keta2) + keta1_pos + 1
                    r += unique_num[keta2_pos + 1]
    print(r)

if __name__ == '__main__':
    main()

Buggy python submission (verdict: Time Limit Exceeded):
import sys
read = sys.stdin.read
readlines = sys.stdin.readlines
from collections import defaultdict
def main():
    n = int(input())
    s = tuple(map(int, tuple(input())))
    num_pos = [] # 各数字がｓ中に最後にあらわれる位置。
    for num in range(10):
        if num in s:
            num_pos.append(n - s[::-1].index(num) - 1)
    unique_num = [0] * n # ｓの各桁でその桁以降にある数字の種類。
    for i1 in range(n):
        unique_num[i1] = sum([np >= i1 for np in num_pos])
    d1 = defaultdict(int)
    for keta1 in range(n - 2):
        for keta2 in range(keta1 + 1, n - 1):
            if not d1[(s[keta1], s[keta2])]:
                d1[(s[keta1], s[keta2])] = unique_num[keta2 + 1]
    r = sum(d1.values())
    print(r)

if __name__ == '__main__':
    main()

Fixed submission:
import sys
read = sys.stdin.read
readlines = sys.stdin.readlines
#from collections import defaultdict
def main():
    n = int(input())
    s = tuple(map(int, tuple(input())))
    num_pos = [] # 各数字がｓ中に最後にあらわれる位置。
    for num in range(10):
        if num in s:
            num_pos.append(n - s[::-1].index(num) - 1)
    unique_num = [0] * n # ｓの各桁でその桁以降にある数字の種類。
    for i1 in range(n):
        unique_num[i1] = sum([np >= i1 for np in num_pos])
    unique_num.append(0)
    r = 0
    for keta1 in range(10):
        if keta1 in s:
            keta1_pos = s.index(keta1)
            for keta2 in range(10):
                if keta2 in s[keta1_pos + 1:]:
                    keta2_pos = s[keta1_pos + 1:].index(keta2) + keta1_pos + 1
                    r += unique_num[keta2_pos + 1]
    print(r)

if __name__ == '__main__':
    main()

Buggy python submission (verdict: Time Limit Exceeded):
import sys
read = sys.stdin.read
readlines = sys.stdin.readlines
from collections import defaultdict
def main():
    n = int(input())
    s = tuple(map(int, tuple(input())))
    num_pos = []
    for num in range(10):
        if num in s:
            num_pos.append(n - s[::-1].index(num) - 1)
    unique_num = [0] * n
    for i1 in range(n):
        unique_num[i1] = sum([np >= i1 for np in num_pos])
    d1 = defaultdict(int)
    for keta1 in range(n - 2):
        for keta2 in range(keta1 + 1, n - 1):
            d1[(s[keta1], s[keta2])] = max(d1[(s[keta1], s[keta2])], unique_num[keta2 + 1])
    r = sum(d1.values())
    print(r)

if __name__ == '__main__':
    main()


Fixed submission:
import sys
read = sys.stdin.read
readlines = sys.stdin.readlines
#from collections import defaultdict
def main():
    n = int(input())
    s = tuple(map(int, tuple(input())))
    num_pos = [] # 各数字がｓ中に最後にあらわれる位置。
    for num in range(10):
        if num in s:
            num_pos.append(n - s[::-1].index(num) - 1)
    unique_num = [0] * n # ｓの各桁でその桁以降にある数字の種類。
    for i1 in range(n):
        unique_num[i1] = sum([np >= i1 for np in num_pos])
    unique_num.append(0)
    r = 0
    for keta1 in range(10):
        if keta1 in s:
            keta1_pos = s.index(keta1)
            for keta2 in range(10):
                if keta2 in s[keta1_pos + 1:]:
                    keta2_pos = s[keta1_pos + 1:].index(keta2) + keta1_pos + 1
                    r += unique_num[keta2_pos + 1]
    print(r)

if __name__ == '__main__':
    main()

Buggy python submission (verdict: Time Limit Exceeded):
import sys
read = sys.stdin.read
readlines = sys.stdin.readlines
from collections import defaultdict
def main():
    n = int(input())
    s = tuple(input())

    unique_num = [0] * n
    for i1 in range(n):
        unique_num[i1] = len(set(s[i1:]))
    d1 = defaultdict(int)
    for keta1 in range(n - 2):
        for keta2 in range(keta1 + 1, n - 1):
            d1[(s[keta1], s[keta2])] = max(d1[(s[keta1], s[keta2])], unique_num[keta2 + 1])
    r = sum(d1.values())
    print(r)

if __name__ == '__main__':
    main()


Fixed submission:
import sys
read = sys.stdin.read
readlines = sys.stdin.readlines
#from collections import defaultdict
def main():
    n = int(input())
    s = tuple(map(int, tuple(input())))
    num_pos = [] # 各数字がｓ中に最後にあらわれる位置。
    for num in range(10):
        if num in s:
            num_pos.append(n - s[::-1].index(num) - 1)
    unique_num = [0] * n # ｓの各桁でその桁以降にある数字の種類。
    for i1 in range(n):
        unique_num[i1] = sum([np >= i1 for np in num_pos])
    unique_num.append(0)
    r = 0
    for keta1 in range(10):
        if keta1 in s:
            keta1_pos = s.index(keta1)
            for keta2 in range(10):
                if keta2 in s[keta1_pos + 1:]:
                    keta2_pos = s[keta1_pos + 1:].index(keta2) + keta1_pos + 1
                    r += unique_num[keta2_pos + 1]
    print(r)

if __name__ == '__main__':
    main()

Buggy python submission (verdict: Time Limit Exceeded):
import sys
read = sys.stdin.read
readlines = sys.stdin.readlines
from collections import defaultdict
def main():
    n = int(input())
    s = tuple(input())

    unique_num = [0] * n
    for i1 in range(n):
        unique_num[i1] = len(set(s[i1:]))
    d1 = defaultdict(int)
    for keta1 in range(n - 2):
        for keta2 in range(keta1 + 1, n - 1):
            d1[(s[keta1], s[keta2])] = max(d1[(s[keta1], s[keta2])], unique_num[keta2 + 1])
    r = sum(d1.values())
    print(r)

if __name__ == '__main__':
    main()


Fixed submission:
import sys
read = sys.stdin.read
readlines = sys.stdin.readlines
#from collections import defaultdict
def main():
    n = int(input())
    s = tuple(map(int, tuple(input())))
    num_pos = [] # 各数字がｓ中に最後にあらわれる位置。
    for num in range(10):
        if num in s:
            num_pos.append(n - s[::-1].index(num) - 1)
    unique_num = [0] * n # ｓの各桁でその桁以降にある数字の種類。
    for i1 in range(n):
        unique_num[i1] = sum([np >= i1 for np in num_pos])
    unique_num.append(0)
    r = 0
    for keta1 in range(10):
        if keta1 in s:
            keta1_pos = s.index(keta1)
            for keta2 in range(10):
                if keta2 in s[keta1_pos + 1:]:
                    keta2_pos = s[keta1_pos + 1:].index(keta2) + keta1_pos + 1
                    r += unique_num[keta2_pos + 1]
    print(r)

if __name__ == '__main__':
    main()