/in/P5.cpp: In function 'int main()':
/in/P5.cpp:25:9: error: 'sort' was not declared in this scope
         sort(p, vint.end());
         ^~~~
/in/P5.cpp:25:9: note: suggested alternative: 'qsort'
         sort(p, vint.end());
         ^~~~
         qsort
/in/P5.cpp:28:13: error: 'reverse' was not declared in this scope
             reverse(p, vint.end());
             ^~~~~~~
/in/P5.cpp:33:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for (int i = 0; i < vint.size(); i++)
                             ~~^~~~~~~~~~~~~