Compilare: main.cpp: In function 'int32_t main()': main.cpp:90:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define for0(i, n) for(int i = 0; i < n; ++i) main.cpp:211:10: for0(i, v.size()) { ~~~~~~~~~~~ main.cpp:211:5: note: in expansion of macro 'for0' for0(i, v.size()) { ^~~~ main.cpp:209:9: warning: unused variable 'initial' [-Wunused-variable] int initial = small; ^~~~~~~