https://leetcode.cn/problems/minimum-time-difference/ https://leetcode.cn/problems/excel-sheet-column-title/ https://leetcode.cn/problems/excel-sheet-column-number/

Author: masx200

README.md

@@ -10,6 +10,12 @@ leetcode 测试
 
 ##### 包含的内容如下
 
+https://leetcode.cn/problems/minimum-time-difference/
+
+https://leetcode.cn/problems/excel-sheet-column-title/
+
+https://leetcode.cn/problems/excel-sheet-column-number/
+
 https://leetcode.cn/problems/minimum-area-rectangle-ii/
 
 https://leetcode.cn/problems/minimum-area-rectangle

excel-sheet-column-number/index.ts

@@ -0,0 +1,6 @@
+export default function titleToNumber(columnTitle: string): number {
+    return columnTitle.length === 1
+        ? columnTitle.charCodeAt(0) - "A".charCodeAt(0) + 1
+        : titleToNumber(columnTitle.at(-1) ?? "") +
+            26 * titleToNumber(columnTitle.slice(0, -1));
+}

excel-sheet-column-title/index.ts

@@ -0,0 +1,6 @@
+export default function convertToTitle(columnNumber: number): string {
+    return columnNumber > 26
+        ? convertToTitle(Math.floor((columnNumber - 1) / 26)) +
+            convertToTitle((columnNumber - 1) % 26 + 1)
+        : String.fromCharCode("A".charCodeAt(0) + columnNumber - 1);
+}

minimum-time-difference/index.ts

@@ -0,0 +1,24 @@
+export default function findMinDifference(timePoints: string[]): number {
+    const n = timePoints.length;
+    if (n > 1440) {
+        return 0;
+    }
+    timePoints.sort();
+    let ans = Number.MAX_VALUE;
+    const t0Minutes = getMinutes(timePoints[0]);
+    let preMinutes = t0Minutes;
+    for (let i = 1; i < n; ++i) {
+        const minutes = getMinutes(timePoints[i]);
+        ans = Math.min(ans, minutes - preMinutes); // 相邻时间的时间差
+        preMinutes = minutes;
+    }
+    ans = Math.min(ans, t0Minutes + 1440 - preMinutes); // 首尾时间的时间差
+    return ans;
+}
+
+function getMinutes(t: string) {
+    const a = t.split("").map(Number);
+    return ((
+                        a[0]
+                    ) * 10 + (a[1])) * 60 + (a[3]) * 10 + (a[4]);
+}