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Problem: Pairs of Songs With Total Durations Divisible by 60

Medium
30 min
Explore how to solve the problem of finding pairs of distinct songs where the total duration is divisible by 60. Understand the approach to track data efficiently and implement solutions that handle permutations and modular arithmetic, helping to sharpen your problem-solving skills.

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 solve the problem of finding pairs of distinct songs where the total duration is divisible by 60. Understand the approach to track data efficiently and implement solutions that handle permutations and modular arithmetic, helping to sharpen your problem-solving skills.

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