2260. Minimum Consecutive Cards to Pick Up

class Solution:
    def minimumCardPickup(self, cards: List[int]) -> int:
        last_found = dict()
        min_length = len(cards) + 100
        s, e = -1, -1
        
        for i, c in enumerate(cards):
            if c in last_found:
                cur_length = i - last_found[c] + 1
                if cur_length < min_length:
                    min_length = cur_length
                    s , e = last_found[c], i
                    
            last_found[c] = i
            
            
        return min_length if min_length < (len(cards) + 100) else -1