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Problem: Pairs of Songs With Total Durations Divisible by 60

Medium
30 min
Explore how to identify pairs of songs with total durations divisible by 60 by applying data tracking and modular arithmetic concepts. Understand the problem constraints and practice implementing a solution that counts valid pairs efficiently.

Statement

You are given a list of songs, where the duration of each song is represented by an integer array time, where time[i] indicates the length of the ithi^{th} song in seconds.

Your task is to find and return the number of pairs of songs (i, j) such that:

  • i < j (i.e., the pair should consist of two distinct songs)

  • The sum of their durations is divisible by 60, i.e., (time[i] + time[j]) % 60 == 0.

Constraints:

  • 11 \leq time.length 1000\leq 1000

  • 11 \leq time[i] 500\leq 500

Problem
Ask
Submissions

Problem: Pairs of Songs With Total Durations Divisible by 60

Medium
30 min
Explore how to identify pairs of songs with total durations divisible by 60 by applying data tracking and modular arithmetic concepts. Understand the problem constraints and practice implementing a solution that counts valid pairs efficiently.

Statement

You are given a list of songs, where the duration of each song is represented by an integer array time, where time[i] indicates the length of the ithi^{th} song in seconds.

Your task is to find and return the number of pairs of songs (i, j) such that:

  • i < j (i.e., the pair should consist of two distinct songs)

  • The sum of their durations is divisible by 60, i.e., (time[i] + time[j]) % 60 == 0.

Constraints:

  • 11 \leq time.length 1000\leq 1000

  • 11 \leq time[i] 500\leq 500