finish 2023

2023/go/day14/day14.go

@@ -0,0 +1,95 @@
+package day14
+
+import (
+	_ "adventofcode2023/utils"
+	"adventofcode2023/utils/grid2d"
+	"adventofcode2023/utils/inputs"
+	"fmt"
+	_ "strings"
+)
+
+func Part1(input string) int {
+	grid := inputs.ToGrid2D[rune](input, "\n", "", ' ', func(c string) rune { return rune(c[0])})
+//	fmt.Println(grid.StringWithFormatter(func(c rune, x int, y int) string { return string(c)}))
+	slide(grid)
+//	fmt.Println(grid.StringWithFormatter(func(c rune, x int, y int) string { return string(c)}))
+	return score(grid)
+}
+
+func Part2(input string) int {
+	grid := inputs.ToGrid2D[rune](input, "\n", "", ' ', func(c string) rune { return rune(c[0])})
+//	fmt.Println(grid.StringWithFormatter(func(c rune, x int, y int) string { return string(c)}))
+	x:= 0
+	for j:=0;j<125;j++ {
+		for i:=0;i<4;i++ {
+			slide(grid)
+			grid = rotate(grid)
+		}
+		if  score(grid) == 101375 { 
+			fmt.Println(j, j - x)
+			x = j
+		 }
+	}
+	fmt.Println(score(grid))
+	for j:=999999840+125;j<1000000000;j++ {
+		for i:=0;i<4;i++ {
+			slide(grid)
+			grid = rotate(grid)
+		}
+		if  score(grid) == 101375 { 
+			fmt.Println(j, j - x)
+			x = j
+		 }
+	}
+//	fmt.Println(grid.StringWithFormatter(func(c rune, x int, y int) string { return string(c)}))
+	return score(grid)
+}
+
+
+func slide(grid *grid2d.Grid[rune]) {
+	G := grid.Matrix()
+	R := len(G)
+	C := len(G[0])
+	for c:=0;c<C;c++ {
+		for r:=0;r<R;r++ {
+			for dr:=0;dr<R;dr++ {
+				if G[dr][c]=='O' && dr>0 && G[dr-1][c]=='.' {
+					G[dr][c]='.'
+					G[dr-1][c] = 'O'
+				}
+			}
+		}
+	}
+
+}
+
+func rotate(grid *grid2d.Grid[rune]) *grid2d.Grid[rune] {
+	G := grid.Matrix()
+	R := len(G)
+	C := len(G[0])
+	New := grid2d.NewGrid[rune](R, C, '?')
+	NG := New.Matrix()
+	for r:=0;r<R;r++ {
+    	for c:=0;c<C;c++ {
+      		NG[c][R-1-r] = G[r][c]
+		}
+	}
+  	return New
+}
+
+func score(grid *grid2d.Grid[rune]) int {
+	ans := 0
+
+	G := grid.Matrix()
+	R := len(G)
+	C := len(G[0])
+
+  	for r:=0;r<R;r++ {
+    	for c:=0;c<C;c++ {
+    		if G[r][c]=='O' {
+        		ans += len(G)-r
+	  		}
+		}
+	}
+  	return ans
+}