Compilare: main.cpp: In function 'void prefix()': main.cpp:13:9: warning: unused variable 'i' [-Wunused-variable] int i=0; ^ main.cpp: In function 'void potrivire()': main.cpp:34:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k==strlen(pre+1)) ~^~~~~~~~~~~~~~~ main.cpp:38:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<ras.size() && i<1000; ++i) ~^~~~~~~~~~~