This was a prompt to a fun little mindbender that I found interesting:
Maria is delivering pizzas to an infinite two-dimensional grid of houses. She begins by delivering a pizza to the house at her starting location; a dispatcher then calls via radio and tells her where to move next. Moves are always exactly one house to the north (^), south (v), east (>), or west (<). After each move, Maria delivers a pizza to the house at her new location. The dispatcher has been a little spacey lately, so Maria sometimes ends up delivering more than one pizza to the same house.
Ex. - ^>v< delivers pizzas to four houses in a square; the house at the starting/ending location ends up with two pizzas. - ^v^v^v^v^v delivers a bunch of pizzas to some very lucky people at only two houses.
Given the string of dispatcher inputs attached to this gist, how many houses receive at least one pizza?
data: ^^<<v<<v^^<><>^^<v<v^>>^^^><^>v^>v><><><<vv^^<^>^^<v^>v>v^v>>>^<>v<^<v^><^>>>>><>^>>^>v^>><<^>v>v<>^v^v^vvv><>^^>v><v<><>^><^^<vv^v^v>>^v^>v><>v^^><<v^>vv^<<>v>>><<<>>^<vv<^<>^^vv>>>^><<<<vv^v^>>><><^>v<>^>v<v^v<^vv><^v^><<<<>^<>v>^v>v<v<v<<>v<^<<>>>>^^v>vv^^<>^<>^^^^<^^^v<v^^>v<^^v^^>v>^v^^^^>><<v<>v<>^v^<v<>><>^^><<^^<^^>vv<>v^<^v<vv<<<>^>^^>^<>v^^vv<>>v><<<>vvv<>v<>><^<^v<>^vv>^^v<v<^<>>vv<^>>^>>vv^v<vv^vv<^<<>>^v^<>^>>>>vv>^^>v>vv>v><^vv^<^<<^^<vvv<v^^<>^^v>^>>v><^<<vv<<v^vv^^^v>>v<<v^><vv^><vv<^vv<<vv^v<<^v<^^v>><<v^>>^^<>v>><<v<>>^^>^^>>vvv^><<<<<^<^vv<^<><v<<>^^^<<<^>^^^<v<vv<>^<>v<^v>^<<<v<v>^v<>>v<<^<<v<<>^<<<><><>^>>>>^>v^v<<v<v<<>>vv<^vvv^^^^vv>^v^^v^<v^v><^vv<^vv>v<^>vv<>>^>^><vv<><^>v>^v>vvv<>^>^v<><>vv>><^v^<><>>v^v^><^<^>vv>v<^>vvv>v<<<<<^<v<<vv<^^^<<>>^v<vv<^<>v>^<v<>><><>^<v^>^><><>>^>^>><^^^>^^>^^v^^<^v^^>v^^>>><<><v<v<<v^vv<><><>^^<<^^v^>v>><>^^^><^vvv<^^^^^v><<><v<^^v><><>>^>vv<vvvv<<>>><v<^^^^v<<^>^vv<v^^v^vv<^^>^^><<v^>v<^^>^<^<v<^^v>^<^>>>^v<>v<^^^>vvv^v<<^><>>><vvv^<^^^<^>>v>>>^^vvv^vvv<^^^^v^v^<vv^^<<^>v^v^<<><>><^v><v<><<>><<<>^v>v<>^<v^v>^vv>>^<>v^^<<^v>>v<>>^v^^>><^>v^<^v^^>><>v^>^v^v<<<v^<v^^v<^>v<><>vv>>>>^>v<>v<<<>^^>vv^v<><v^<>^<<<<>>^^>^v<v^v<<><>^v<>>^v^<<^<^>>>^vv<><v<^^<>v^>>v<^^v>>^>><<><<<>><vv>^v>><^^vv<v<>>><>v^><>vv<^^v^^^v<>><^vvv<<^<>v>>>v>><>>><>><v^><v^v^v>v>^^<^>^>v><>vv>^v><<>>>>>>>^<<^vv^^vvvv<^^><<<v<<>vvv<>^><<v<v^v^<v<>>^<vv^<v^<<^^vv>v>^<vv<<>v<v^<>v>>^v^^vvvv>^^>>v^v^^><<^>v>>^^>^<^^<>vvv^vv>v>^v<><^vv^<vv<v^^^v<^v^>>^v>>>^^<^<^>^v^>^>>>^v>^>^^^>>^<>v^^<>^v<<^^>^^<vv<>v<^v^>><^v^>^<>>^vv^vv^>v^<vvvvvv^>><^^<^v<^<v^<<^^<<v^<^>><>v><^v^v^^^v>v^<>^<<v<^^vvv^^>^v^^<><vv^v^>v^<<>>vv<>>>>v>v<>^>>>v<>^^><v<v^^^<>^<^><>^><><>^<<>>><<^<vvv<^>>^vv^v>><v<>vv^<<^^<<><<^<v<vv<<^v^vv>v^>>>v<<<<v<<>v>^vv<^v><vv<^>^^vv>v>><<v<<v^v>>><>^<>><><<^<<^v^v<v>v<v<^^>vv<^v^^^<v^<<<v<>v^><^v>^<^>^<<>v^<><>>^v<>vvv<vvvvv<^^><^>><^^>^>^v^vv<^><<^v>><^^v>^v<>^>vvvv><^>^<<v^^vv<v^^<><>v>^>>^<^<<<^v^^^>^>>^>><><<^>v^^>v<<<<vvv<vvvv^<^<v^^<>^>vvv^<vv^v^v>^<<><^v^v^^^>^^>^vv<>v>>v^>vv^vv>v<^v^^>>^v^v<>>^^><<v<<>><>>>^>^<>^^v^^><^<>><<^<vv^^^^^>>vv^<v^<^>>>>v<<><<^>vv>vvv>^<><>>>>vv><<v^v<^^^<<^^^vv^<v<><><<<<>><<v^<>v>v^><>v^v^^><>v>v>^^v<^v<>>^^^^^><v^>^^><v^^>v<^<^>>>^><^^>><<>>^><>^^^>v^^^>^^v^<>^^><^>>><><^>>v<v^>v<^><v<v^<>v<^v>v^<^vv^^><<<><><^v^<v<^^>v>v^>>^^vv^^v>^<^v<>^>^><^^v><^<^<>v^^>^><>>><<<><>v<<^v^^<^><>^<><>v<^^<v>^^<<>>^><^><^<^>^^v<>v>>><><<>^>v><><<<<v^^^^v<>>^^^v>><<^v>^>>><vv^>>^vv<^<>>^<^^<^v>v<v<<<<<>^<<^<<<<<^<^>>^><<>><>v^v>^<^>v^<><vvv^>^v^v^v><^<v<>vv<<^<>^^^<>^v>^<v^^<v^v>v<>>^>v<<>v<>v^v>v<<<>>v>vv>>v<<>v<>v<^>^>^>v>^>^^^v<<>>>^vvv^^>^^<^vv^^^^>v>^v^>v^^v^>>^v>^vv>^^v^<<<<>^<><^<^<<^^>v^^^v<>>vvv>vv><v^<^v>>^v<vv^<<v<^^v^v>v<>^v<<<^^v^^^<^v>v^v^v>><vvv<<>v<>^v>vv^v>vv<<^v^v>v>><^v<v<>v>>>><<<><>^v^<^vvv>v<>><^v>^>>vv<><><>v><>>><^>vv>>^<>v^>>^><<<^><<>^v^>>><><>vv>^<>^>^v^^><^>>><<>v^<^vv>^<^vv>><v<>vv<><<^><>v<^^<^>vv^^^^vv<<>vv<>v<>>>>^><>^<><>v<>><<>^^vvv>^^^<><>>vvv^v>><>vv^^^v^<<>^^v<><<^^v<>^^>^<^^v>>v^v^^>>v>>>^<<^<>^>^^v>>>><vv<<>^v<<<^^vv><^>vv<>>vv^>v>>v^<vv<<<v^>vvv^^>vv^<v^>>v^<>>><><<^^<^v>^>>>v>v>^v<>vv><vv<vvv<v>^v<<<>><<><><>v^>>>v^>v^>>vv^^^<>>><^>v^<>^^>v<><<<><v^v<<<v<v^>v^v>^>v<^<>v>v^^>>v>vv^v<>>^^^^<>v^>>>>>>>><v<^<<vvv<^v^>^v<^<<>>><<<^<<^>^>v^<>^<<<>v>><^vv^>^>^>>>^<v^^^<v^<v<><v^vvv<>v<vvv^vv<<<v^<^<^vvvv^<<vv<^v><<>^>^<v^v^<^>v^><>>v^>v^>^>>v<>vv^v<<>^^>>vv<>vv>>^v<^vv>^v>v<v^vvv^<<^><>v^<><>v^^><<<><>^>^v^<>><vv<^>v^v>v<>><v<<^>^<vv<^v>^<<^<^^vv^<>><v^>^vv^<>>^^^^v>v><^^^v^<<<>^<^<<>><>>v<<^v^>><><v^>>^vv^v>vv>>>>>>^^<<>v^>v^v>^^>>><vv^^^v>^v>>^^^<>><>v^<<<v<vv^^<v^<<<>v>v^^^<vv<>>^v>^v<^<<><>vv>^^^<^^vv<v<^^>vv>v<<^>^vv><^>^^^^v<v^<<^^>>^^vvvv^v^>vv>>v^vvv<>>^><>>v^^>>^<>>vvvv^>><v^v<^^<^vv>>v<<^<<^><v^^><v^>v^>><<v>v^>^v<v^vv<^^^v<^<vvvvv<><>v<v<v<<^v<><<>vv>>><^>>^^v>^>><>vv^><<>>vv<<<^<^^>^<<^>>>><v<^v<<<>>v>vv<^>^v><>>v<v^v<>v^vvvv>v^>>v><<^^^v>>vv^^>v>^v>^v^^>^<^vv<v<<^>vv<<^>>^<<^^>>^<^>v^><^vv>^^v><v^>>><>v^v>^v<^><<<>vv>v<><>>v^<>^^>^<>^<<^>>vv^><^<v<^^vvv>>v^>>v^>v>vv><>>v<^>><<<v<<v<vvvv^vvv^vv^>^>v><vv<v^^<>>>>vv^>^<>v<^>^<^v>vv<^<<>>^<^<^^<>^<<v^v^>v<<>v>><^v<<^vvv>v>v<<^^<^^>v<vv<v<v^v>^^^>^>vv<v<<^^v^<v<^>^^^vv>v<>>>vv>><><^><><<<vvv<<^^v^<v^<<^>>vv>vv^v^>>><<v^v>>v>>vv>^^vvv^>^^>^>^>^v<<^vv^>vvv^^vv><^>^v^>^><>v<^^vv<v^<><^<>>^^v^v>v^vv<>><^v>^<^v>^<>^v>>>><<vv^^^vv^>>><vv^v>>v><^v^vv><<^v<<>^^<^v>vvv<><^^><<^v><>^<^v<^^<^vvvv^^>>>>vv>v>>>v<v^><<<>v^>>vv^v<vv<>vv<>vvv>>>><>>><>^v<v^v><vvv<<v^^v^v<>>><>>^vv<<v<><<vv<v^>^^vv><^v^v<v^vvv^v>v^^^vv>^><^vvv<<>^vvv^<v<v^v>>>>^<<<><<<<<^v<^^>>>>^>^<v^^^v<vvv<vv^<>v<<<^<^>>v^<<><<^^vvv^>v<>>^^>v>^v>>v>>>^<^<^>v^v<vv<>^>><>^<<^vvv^^<>^<vvv<>v^>^^<<^>^vv>>v^v^>v>^<^^<>^>^>>>^^vvv^<<>v^<<>><>v<^<^>v^>^vv><v<^<<<^v>^>>^<^v^<<<<^v^><v^v>v^><<v<><<v^<<^<<v<<><^^^^>v>^^>v<vvv<<<>><>>^><<><^<>>^^>vv<^><^v^>>>vvv<<vv^<^^^<^>^<>>^>>^v^<^^v>^<v<<>^^v<^vv^>>^v><<^<v^<><><>>^>vv<<>^^^v^^<v<>><>>vv>v^>vvv^^v<vv<^<^>>^>>^>>v^<<<v^>v^<^v^vv^><^<^v<<v<<>v>^v^<<<v^vv<v<<>^^>>^<v<^>^^v>>><vv<^^<<>><<v^^v^>>^^>>^v^<^v>v^v^v^v^>v^vv<><>^^<>^><^^^<<<^v<<>^<^^^^^v^<^<<^^>^vv<>v^>><>>^>v>v<>^>v<v^>>><>^<>>>^>^>>v^><v<>v><^vv^>v<v<><<vv<^><^<v^>v<<v^v<<><>v<>^^<v<>><<>v>vv<^vvv><><>vv^<<>^>^<^>>>^v>v<^v^^^vv<>>>^<<^>>><<^^v^>v^<^v>vvv>v^^vv>^^>>v<>^<<>^<><^^v^>><>^>v>>^^^<<^^v<>^^>^<>^>><^>^vvv><^>^<^>^>>vv<^>>^v>>^<>>^^>>>v^>v<<v<^>>v^^vv>v><^v^^><vv^v<^>v<<>v^^<><>^>vvv><^^^>^v^>v>>^vvv<^vv>^^>^>>v<>><<^v<<v^>^><>vv^<<^^vv>>^<^><^^v^<<>^v^^>v^>>^^^<^vv>v^>>>vv<<>v>>>^>v^^<v^v^^v^>>v<v<^<<>>vv<<^v>v<<vv<<^<^v<^<><^^>v>>v>v^>><vv<^v<^>^>>v>^><<^<<>^v>><^^<^<<<v^^>^>vv<<>^<>^<v^<<^v>vv>^^^v<^v><v<<<<vv>^^^^>v>v><<^<<<^vv><^<<<>><v^v>v<<v^^<v^>v>^v^v^<^<^vv>vvv<^^v<>v<<<<>v<v^<vvv^^^<<^<^<<>^<<><<<>v<^>^^v<^^v^>vv>vvv>v><v^^<<>>^><^>>v<v<<^^^v<<^v^^><><<<><<>v>^<<>v<<<^v>><v^v<^v<v^vv>v>><<^<><^v^^v^>^>vvvv<<><<>>^^^><v<>v>v<v^^>^><>>><^><<><<<^<>v^><vv^^^^>>^v^>v^<>>v>^^><^<^v^<v^>>v>^vvv<>>v<v^v><>^vvvv<v^<<v^<<^^vv>><<<<<<<<v<v^v^^<v^^<>v<<<<^v<<><<v^<^><v<vv<v^v^<v^^vv<v^v<<<>^<<>vv<v<^>^<<><vv<<vv<v<^<^<>><^^<<>>>vv>>>>>>^v<v<>>v^v^^<v^<<<<>><<^v^^^<>^>>><>v^v^vvv^>>v>><v^v<<<^v>>^^<<^^vv><<<^^^<<<^^>>>>vvv^v<^>^^>v<^<><vv<v<>v>>>^vv<<^^v^>^>^v>v>v^v^>v<><>><v^^<<^>>>><<^v^<>^v<>vvv^>v>v<v<v^>^<><><>^>>><v<<<v^vv><>^>^^<<v^>>v^^>^><>><>v^v^^v>>>>vv>>^v<<^v^<>^>v^^>^^<^<v^<<^<<>><<<^^^v^^^^v<^<>v<^^<>vv^^v^<>^<<^>>v>v<<<^^^^vvv^<^<><>v<<v^<^<>>><<><<<v<v^^<vv<<vv<<<v<^>^^vv<v<>><<>>>^v<<>^>>>v^>v>^^<>^<vv<><^>v>^>>>><>^^>v^^v>^vv^^v^><<<>>v<>v<vv<vv^v^v<^v^<^^><<<><vv^^>^<^<<>v>>>>^<vvv<^><^<<^>v>>v><<v<<^v^<>>^>>>^v^v>v^^vv^>^<^^>>^><^vv^^vv^<>>^^^^<^^><><v<>>^>>^><vv^>^vvv<^<<v^^<<<>^><>>>^^<><v<v<><<v^^^^^<^<^<<>><<>>>>^<<>>>^<^v^>><<^>>>^<^>><>^^<>^v^^vv<><^>vv^^v^<^^^v^vvv^>><>>v<<vv<>>^<^vvv<<^^><vvv^^<v<>vv^^<<>>><^^vvv<<<^>^<><^>vv^><^<<>vv<>vv>v>v^<<>^^^^v^^^^^<<^><><^^v^>v>^>><^><<>v^>>^vvv>>^<^<>^^v^vv^^v><<vv^<>>>v<<<>v>^<>v<<>v^>^<<><<><v<v<v<>v^>v<><^^>^<^v^^><^>vv>^>vv<v<^v>vv>^^><<>vv^>^v<<^<<^<<>v<v<^v>>^><v^^v^v>>>><v^v^<<<vv<<^^<>>v^v<^v>v>^^^v<v^^^vv<>v^v<^<>v><><v^<>>vv>v><>v>^v<><<<<<<v<>>v^vv<<<<v<<^<>^>><>^^vv>^<^<<>vv>>vv><><v<>><^^><^<>^><>v^^^^v<v^^v<>^^vv<>v<>v>^vv^><v^<<^<>^<>^^^>v^>>>v><<^>>v<^v<>^^<v<><v^vv<><v<<>v<^<^>v<>v^>v>^^<<<^^vv^<><<<>>v>^^<>v>>>><v<v<^^^v<v<v^><<>v^v<>v>><<<<v^<><^<<^>^<vvv<v^^v>>v^vv^><^v^^<>^^><<v^>>vv>^<v^vv<^^v<>>vvv<^v^>>^<v>^>^^<<^>^>^v><>>^<^^v>^>>^^<><>>>^^>^^vvv>v<^^<>v^v^^<v<<^<v^v^<<>v^v<v<<v<>>><<^^^>>v>^vv>^>^^v<>^^<>v^^<><v<v<vvv^<vv<<>v^><<><v<>vv<<^vvvv><<v>v^>v^<>v^>^<v<vvv^>^<>^>^^v<>><<<><v<^^>^v^^v^v<<<^v^<>^<>v>^^>v<vv>^^<<<><<^>v<v<^vv^v><^^<^<<>^>>>>><v^v<<<^>^v^v<<v<>vvv<<>v>v>>^v^v^>><<<<>v^<v<><<>>>^>>^>><
React
Typescript
Django
Laravel
Facebook
Microsoft
Google
Alibaba
D3
Tencent