Add 1618

Author: trung-hn

Readme.md

@@ -291,6 +291,7 @@
 | 1609 | Even Odd Tree | Easy | O(N) | O(N) | Tree | | |
 | 1614 | Maximum Nesting Depth of the Parentheses | Easy | O(N) | O(1) | String | | |
 | 1615 | Maximal Network Rank | Medium | O(N) | O(1) | Graph | | |
+| 1618 | Maximum Font to Fit a Sentence in a Screen | Medium | O(logN) | O(1) | Premium, String, Binary Search | | 🔒 |
 | 1624 | Largest Substring Between Two Equal Characters | Easy | O(N) | O(1) | String | | |
 | 1629 | Slowest Key | Easy | O(N) | O(1) | String | | |
 | 1634 | Add Two Polynomials Represented as Linked Lists | Medium | O(N) | O(1) | Premium, Linked List | | 🔒 |

src/1618.py

@@ -0,0 +1,38 @@
+# TAGS: Premium, String, Binary Search
+# """
+# This is FontInfo's API interface.
+# You should not implement it, or speculate about its implementation
+# """
+#class FontInfo(object):
+#    Return the width of char ch when fontSize is used.
+#    def getWidth(self, fontSize, ch):
+#        """
+#        :type fontSize: int
+#        :type ch: char
+#        :rtype int
+#        """
+# 
+#    def getHeight(self, fontSize):
+#        """
+#        :type fontSize: int
+#        :rtype int
+#        """
+class Solution:
+    # Without counter. 692 ms, 8.6%  Time: O(NlogN). Space: O(1)
+    # With counter. 480 ms, 74.19%  Time: O(logN). Space: O(1)
+    def maxFont(self, text: str, w: int, h: int, fonts: List[int], fontInfo : 'FontInfo') -> int:
+        counter = collections.Counter(text)
+        def fit_on_screen(font_size, text):
+            width = sum(fontInfo.getWidth(font_size, c) * f for c, f in counter.items())
+            height = fontInfo.getHeight(font_size)
+            return width <= w and height <= h
+        
+        lo, hi = 0, len(fonts) - 1
+        while lo < hi:
+            mid = (lo + hi + 1) // 2
+            if fit_on_screen(fonts[mid], text):
+                lo = mid
+            else:
+                hi = mid - 1
+                
+        return fonts[lo] if fit_on_screen(fonts[lo], text) else -1

testcases/1618

@@ -0,0 +1,20 @@
+"helloworld"
+80
+20
+[6,8,10,12,14,16,18,24,36]
+"leetcode"
+1000
+50
+[1,2,4]
+"easyquestion"
+100
+100
+[10,15,20,25]
+"abc"
+10
+10
+[1]
+"abc"
+10
+10
+[100]