up till 07/01/2024

9/go.mod

@@ -0,0 +1,3 @@
+module day92
+
+go 1.22.4

9/main.go

@@ -9,8 +9,8 @@ import (
 )
 
 func main() {
-//  file, _ := os.Open("test")
-  file, _ := os.Open("input")
+  file, _ := os.Open("test")
+//  file, _ := os.Open("input")
   defer file.Close()
   scanner := bufio.NewScanner(file)
   diskMap := []string{}
@@ -20,37 +20,129 @@ func main() {
   }
   fileID := 0
   blockSize := 0
+  blockSizes := []int{}
   freeSpace := 0
+  freeSpaces := []int{}
   blocks := []string{}
   for i := range diskMap {
     if i % 2 == 0 {
       blockSize, _ = strconv.Atoi(diskMap[i])
+      blockSizes = append(blockSizes, blockSize)
       for j:=0;j<blockSize;j++ {
         blocks = append(blocks, strconv.Itoa(fileID))
       }
       fileID++
     } else {
       freeSpace, _ = strconv.Atoi(diskMap[i])
+      freeSpaces = append(freeSpaces, freeSpace)
       for j:=0;j<freeSpace;j++ {
         blocks = append(blocks, ".")
       }
     }
   }
-  for i := range blocks {
-    if blocks[i] == "." {
-      for j:=len(blocks)-1;j>i;j-- {
-        if blocks[j] != "." {
-          blocks[i] = blocks[j]
-          blocks[j] = "."
+//  for i := range blocks {
+//    if blocks[i] == "." {
+//      for j:=len(blocks)-1;j>i;j-- {
+//        if blocks[j] != "." {
+//          blocks[i] = blocks[j]
+//          blocks[j] = "."
+//          break
+//        }
+//      }
+//    }
+//  }
+//  checksum := 0
+//  for i := range blocks {
+//    blockID, _ := strconv.Atoi(blocks[i])
+//    checksum = checksum + i * blockID
+//  }
+//  fmt.Println(checksum)
+  fmt.Println(blocks)
+//  moved := []bool{}
+//  for i:=0;i<fileID;i++ {
+//    moved = append(moved, false)
+//  }
+//  for id:=fileID-1;id>=0;id-- {
+//    for j:=0;j<id;j++{
+//      fmt.Println("1.", blockSizes[id], "<=", freeSpaces[j])
+//      if blockSizes[id] <= freeSpaces[j] {
+//        for k:=len(blocks)-1;k>=0;k-- {
+//          if blocks[k] == strconv.Itoa(j) {
+//            fmt.Println("2. k:", k, "blocks[k]:", blocks[k])
+//            changed := []int{}
+//            for l:=0;l<blockSizes[id];l++ {
+//              emptyPosition := 0
+//              found := false
+//              for ! found {
+//                if blocks[k+emptyPosition+1+l] == "." {
+//                  found = true
+//                  break
+//                } else {
+//                  emptyPosition++
+//                }
+//              }
+//              blocks[k+emptyPosition+1+l] = strconv.Itoa(id)
+//              fmt.Println(blocks)
+//              changed = append(changed, k+1+l)
+//            }
+//            for x1:=0;x1<len(blocks);x1++ {
+//              if blocks[x1] == strconv.Itoa(id) && ! slices.Contains(changed, x1) {
+//                blocks[x1] = "."
+//              }
+//            }
+//            fmt.Println("3.1 before", freeSpaces[j])
+//            freeSpaces[j] = freeSpaces[j]-blockSizes[id]
+//            fmt.Println("3.2 after", freeSpaces[j])
+//            moved[id] = true
+//            break
+//          }
+//        }
+//      }
+//      if moved[id] {
+//        break
+//      }
+//    }
+//  }
+//  fmt.Println(blocks)
+  //TRY2
+  for id:=fileID-1;id>=0;id-- {
+    idPositions := findIDpositions(blocks, id)
+    for i:=0;i<fileID-1;i++ {
+      spacesPositionsAfterID := findSpacesAfterID(blocks, i)
+      if len(idPositions) <= len(spacesPositionsAfterID) {
+        for i:=0;i<len(spacesPositionsAfterID);i++ {
+          blocks[spacesPositionsAfterID[i]] = strconv.Itoa(id)
+          fmt.Println(blocks)
+        }
+        for i:=0;i<len(idPositions);i++ {
+          blocks[idPositions[i]] = "."
+          fmt.Println(blocks)
+        }
         break
       }
     }
   }
-  }
-  checksum := 0
-  for i := range blocks {
-    blockID, _ := strconv.Atoi(blocks[i])
-    checksum = checksum + i * blockID
-  }
-  fmt.Println(checksum)
+  fmt.Println(blocks)
+}
+
+
+func findIDpositions(blocks []string, id int) []int {
+  positions := []int{}
+  for i := range blocks {
+    if blocks[i] == strconv.Itoa(id) {
+      positions = append(positions, i)
+    }
+  }
+  return positions
+}
+
+func findSpacesAfterID(blocks []string, id int) []int {
+  spaces := []int{}
+  idPositions := findIDpositions(blocks,id)
+  for i:=idPositions[len(idPositions)-1];i<len(blocks);i++ {
+    if blocks[i] == "." {
+      spaces = append(spaces, i)
+    }
+  }
+  return spaces
 }