foo.cc: In function 'int main()':
foo.cc:27:5: error: 'sort' was not declared in this scope
     sort(a, a + k, cmp);
     ^~~~
foo.cc:27:5: note: suggested alternative: 'qsort'
     sort(a, a + k, cmp);
     ^~~~
     qsort

正在同步测试数据，请稍后