leetcode 耗时100 1700. Number of Students Unable to Eat Lunch

Problem: 1700. 无法吃午餐的学生数量双端队列的模拟学生单指针向后移动若连续队首学生和sandwich都不相同的统计数量num std.size()就返回Codeclass Solution { public: int countStudents(vectorint students, vectorint sandwiches) { dequeint stu; int n students.size(); for( int i 0; i n; i ) { stu.push_back(students[i]); } int i 0, num 0; while( i n ) { if(stu.front() sandwiches[i]) { i; stu.pop_front(); num 0; } else { stu.push_back(stu.front()); stu.pop_front(); num; } if(num stu.size()) break; } return stu.size(); } };