Pairs of Songs With Total Durations Divisible by 60 (Leetcode 1010)

Problem Link: https://leetcode.com/problems/pairs-of-songs-with-total-durations-divisible-by-60/

class Solution:
    def numPairsDivisibleBy60(self, time: List[int]) -> int:
        
        d={}
        n=len(time)
        ans=0
        for i in range(n):
            
            rem=time[i]%60
            if(rem==0):
                if(0 in d):
                    ans=ans+d[0]
            else:
                if(60-rem in d):
                    ans=ans+d[60-rem]
                
            if(rem not in d):
                d[rem]=1
            else:
                d[rem]+=1
        
        return ans