Compilare: main.cpp: In function 'int main()': main.cpp:56:6: warning: unused variable 'last' [-Wunused-variable] int last = vp.size()-1 ; ^~~~ main.cpp:14:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("sormin.in" , "r" , stdin) ; ^ main.cpp:15:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("sormin.out" , "w" , stdout) ; ^