Compilare: main.cpp: In function 'int sum()': main.cpp:19:17: warning: variable 'si' set but not used [-Wunused-but-set-variable] int sm = 0, si = 0; ^~ main.cpp: In function 'int pmic()': main.cpp:45:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v.size(); ++i) { ~~^~~~~~~~~~ main.cpp:34:9: warning: unused variable 'val' [-Wunused-variable] int val; ^~~ main.cpp: In function 'int pmare()': main.cpp:57:9: warning: unused variable 'val' [-Wunused-variable] int val; ^~~