Compilare: main.cpp: In function 'int main()': main.cpp:14:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v.size();i++) ~^~~~~~~~~ main.cpp:18:57: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] { if(v[j]>v[j+1] and v[j+1]<v[j+2] and j+2<v.size()) j++,semn*=-1; ~~~^~~~~~~~~ main.cpp:22:57: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] { if(v[j]<v[j+1] and v[j+1]>v[j+2] and j+2<v.size()) j++,semn*=-1; ~~~^~~~~~~~~