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feat: Revised the book (#978)
* Sync recent changes to the revised Word. * Revised the preface chapter * Revised the introduction chapter * Revised the computation complexity chapter * Revised the chapter data structure * Revised the chapter array and linked list * Revised the chapter stack and queue * Revised the chapter hashing * Revised the chapter tree * Revised the chapter heap * Revised the chapter graph * Revised the chapter searching * Reivised the sorting chapter * Revised the divide and conquer chapter * Revised the chapter backtacking * Revised the DP chapter * Revised the greedy chapter * Revised the appendix chapter * Revised the preface chapter doubly * Revised the figures
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@ -20,7 +20,7 @@ function backtrack(choices, state, n, res) {
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/* 爬楼梯:回溯 */
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function climbingStairsBacktrack(n) {
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const choices = [1, 2]; // 可选择向上爬 1 或 2 阶
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const choices = [1, 2]; // 可选择向上爬 1 阶或 2 阶
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const state = 0; // 从第 0 阶开始爬
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const res = new Map();
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res.set(0, 0); // 使用 res[0] 记录方案数量
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@ -16,7 +16,7 @@ function coinChangeDP(coins, amt) {
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for (let a = 1; a <= amt; a++) {
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dp[0][a] = MAX;
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}
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// 状态转移:其余行列
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// 状态转移:其余行和列
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for (let i = 1; i <= n; i++) {
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for (let a = 1; a <= amt; a++) {
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if (coins[i - 1] > a) {
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@ -66,7 +66,7 @@ function editDistanceDP(s, t) {
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for (let j = 1; j <= m; j++) {
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dp[0][j] = j;
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}
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// 状态转移:其余行列
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// 状态转移:其余行和列
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for (let i = 1; i <= n; i++) {
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for (let j = 1; j <= m; j++) {
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if (s.charAt(i - 1) === t.charAt(j - 1)) {
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@ -6,11 +6,11 @@
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/* 0-1 背包:暴力搜索 */
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function knapsackDFS(wgt, val, i, c) {
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// 若已选完所有物品或背包无容量,则返回价值 0
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// 若已选完所有物品或背包无剩余容量,则返回价值 0
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if (i === 0 || c === 0) {
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return 0;
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}
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// 若超过背包容量,则只能不放入背包
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// 若超过背包容量,则只能选择不放入背包
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if (wgt[i - 1] > c) {
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return knapsackDFS(wgt, val, i - 1, c);
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}
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@ -23,7 +23,7 @@ function knapsackDFS(wgt, val, i, c) {
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/* 0-1 背包:记忆化搜索 */
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function knapsackDFSMem(wgt, val, mem, i, c) {
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// 若已选完所有物品或背包无容量,则返回价值 0
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// 若已选完所有物品或背包无剩余容量,则返回价值 0
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if (i === 0 || c === 0) {
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return 0;
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}
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@ -31,7 +31,7 @@ function knapsackDFSMem(wgt, val, mem, i, c) {
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if (mem[i][c] !== -1) {
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return mem[i][c];
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}
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// 若超过背包容量,则只能不放入背包
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// 若超过背包容量,则只能选择不放入背包
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if (wgt[i - 1] > c) {
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return knapsackDFSMem(wgt, val, mem, i - 1, c);
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}
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@ -60,7 +60,7 @@ function minPathSumDP(grid) {
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for (let 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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// 状态转移:其余行列
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// 状态转移:其余行和列
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for (let i = 1; i < n; i++) {
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for (let 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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