Want to know:
Use 2 hashmap starts and endsthen for (int i = 0; i < length; i++) { if (starts.containsKey(i)) { val += starts.get(i); } res[i] = val; if (ends.containsKey(i)) { val -= ends.get(i); } }也有一种tricky一点的方法,start index存val,end + 1存 - val, 然后一路求和过来就可以
Get a detailed, AI-powered explanation for this question and thousands more on StudyFetch.
Get the Answer for FreeHow StudyFetch Helps You Master This Topic
AI-Powered Answers
Get instant, detailed explanations powered by AI that understands your course material.
Deep Understanding
Go beyond surface-level answers with step-by-step breakdowns and examples.
Personalized Learning
Sparky adapts to your learning style and helps you connect ideas.
Practice & Test
Turn any question into flashcards, quizzes, and practice tests to solidify your knowledge.
Explore More Questions
- Le c_____ est la d_____ g____ de la variableLa m______ est la définition o______ souvent un t______Les d_____ b_____ sont les r_____ provenant de mesures
- Quel est le plus grand multiple de 2 et de 3 inférieur à 20 ?
- endothélium est active il exprime les sélectines P et E ils se lient au motif des leucocytes facilitant