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https://github.com/krahets/hello-algo.git
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Translate all code to English (#1836)
* Review the EN heading format. * Fix pythontutor headings. * Fix pythontutor headings. * bug fixes * Fix headings in **/summary.md * Revisit the CN-to-EN translation for Python code using Claude-4.5 * Revisit the CN-to-EN translation for Java code using Claude-4.5 * Revisit the CN-to-EN translation for Cpp code using Claude-4.5. * Fix the dictionary. * Fix cpp code translation for the multipart strings. * Translate Go code to English. * Update workflows to test EN code. * Add EN translation for C. * Add EN translation for CSharp. * Add EN translation for Swift. * Trigger the CI check. * Revert. * Update en/hash_map.md * Add the EN version of Dart code. * Add the EN version of Kotlin code. * Add missing code files. * Add the EN version of JavaScript code. * Add the EN version of TypeScript code. * Fix the workflows. * Add the EN version of Ruby code. * Add the EN version of Rust code. * Update the CI check for the English version code. * Update Python CI check. * Fix cmakelists for en/C code. * Fix Ruby comments
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@@ -9,41 +9,41 @@ package chapter_dynamic_programming;
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import java.util.Arrays;
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public class min_path_sum {
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/* Minimum path sum: Brute force search */
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/* Minimum path sum: Brute-force search */
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static int minPathSumDFS(int[][] grid, int i, int j) {
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// If it's the top-left cell, terminate the search
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if (i == 0 && j == 0) {
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return grid[0][0];
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}
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// If the row or column index is out of bounds, return a +∞ cost
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// If row or column index is out of bounds, return +∞ cost
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if (i < 0 || j < 0) {
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return Integer.MAX_VALUE;
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}
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// Calculate the minimum path cost from the top-left to (i-1, j) and (i, j-1)
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// Calculate the minimum path cost from top-left to (i-1, j) and (i, j-1)
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int up = minPathSumDFS(grid, i - 1, j);
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int left = minPathSumDFS(grid, i, j - 1);
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// Return the minimum path cost from the top-left to (i, j)
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// Return the minimum path cost from top-left to (i, j)
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return Math.min(left, up) + grid[i][j];
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}
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/* Minimum path sum: Memoized search */
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/* Minimum path sum: Memoization search */
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static int minPathSumDFSMem(int[][] grid, int[][] mem, int i, int j) {
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// If it's the top-left cell, terminate the search
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if (i == 0 && j == 0) {
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return grid[0][0];
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}
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// If the row or column index is out of bounds, return a +∞ cost
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// If row or column index is out of bounds, return +∞ cost
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if (i < 0 || j < 0) {
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return Integer.MAX_VALUE;
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}
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// If there is a record, return it
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// If there's a record, return it directly
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if (mem[i][j] != -1) {
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return mem[i][j];
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}
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// The minimum path cost from the left and top cells
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// Minimum path cost for left and upper cells
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int up = minPathSumDFSMem(grid, mem, i - 1, j);
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int left = minPathSumDFSMem(grid, mem, i, j - 1);
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// Record and return the minimum path cost from the top-left to (i, j)
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// Record and return the minimum path cost from top-left to (i, j)
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mem[i][j] = Math.min(left, up) + grid[i][j];
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return mem[i][j];
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}
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@@ -62,7 +62,7 @@ public class min_path_sum {
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for (int i = 1; i < n; i++) {
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dp[i][0] = dp[i - 1][0] + grid[i][0];
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}
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// State transition: the rest of the rows and columns
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// State transition: rest of the rows and columns
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for (int i = 1; i < n; i++) {
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for (int j = 1; j < m; j++) {
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dp[i][j] = Math.min(dp[i][j - 1], dp[i - 1][j]) + grid[i][j];
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@@ -81,11 +81,11 @@ public class min_path_sum {
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for (int j = 1; j < m; j++) {
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dp[j] = dp[j - 1] + grid[0][j];
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}
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// State transition: the rest of the rows
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// State transition: rest of the rows
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for (int i = 1; i < n; i++) {
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// State transition: first column
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dp[0] = dp[0] + grid[i][0];
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// State transition: the rest of the columns
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// State transition: rest of the columns
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for (int j = 1; j < m; j++) {
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dp[j] = Math.min(dp[j - 1], dp[j]) + grid[i][j];
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}
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@@ -102,24 +102,24 @@ public class min_path_sum {
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};
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int n = grid.length, m = grid[0].length;
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// Brute force search
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// Brute-force search
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int res = minPathSumDFS(grid, n - 1, m - 1);
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System.out.println("The minimum path sum from the top left corner to the bottom right corner is " + res);
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System.out.println("Minimum path sum from top-left to bottom-right is " + res);
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// Memoized search
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// Memoization search
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int[][] mem = new int[n][m];
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for (int[] row : mem) {
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Arrays.fill(row, -1);
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}
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res = minPathSumDFSMem(grid, mem, n - 1, m - 1);
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System.out.println("The minimum path sum from the top left corner to the bottom right corner is " + res);
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System.out.println("Minimum path sum from top-left to bottom-right is " + res);
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// Dynamic programming
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res = minPathSumDP(grid);
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System.out.println("The minimum path sum from the top left corner to the bottom right corner is " + res);
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System.out.println("Minimum path sum from top-left to bottom-right is " + res);
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// Space-optimized dynamic programming
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res = minPathSumDPComp(grid);
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System.out.println("The minimum path sum from the top left corner to the bottom right corner is " + res);
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System.out.println("Minimum path sum from top-left to bottom-right is " + res);
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}
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}
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