Compilare: main.cpp: In function 'int find(int)': main.cpp:29:13: warning: unused variable 'y' [-Wunused-variable] int y = t[x]; ^ main.cpp: In function 'int merge(int, int)': main.cpp:59:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int main()': main.cpp:90:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<op.size();i++) ~^~~~~~~~~~