Compilare: main.cpp: In function 'int main()': main.cpp:24:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < strlen(v); i++) { ~~^~~~~~~~~~~ main.cpp:51:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < polo.size(); i++) { ~~^~~~~~~~~~~~~ main.cpp:65:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < polo.size(); i++) { ~~^~~~~~~~~~~~~ main.cpp: In function 'int prioritate(char)': main.cpp:16:1: warning: control reaches end of non-void function [-Wreturn-type] } ^