Compilare: main.cpp: In function 'void precalc()': main.cpp:41:6: warning: variable 'firstTime' set but not used [-Wunused-but-set-variable] int firstTime = 1; ^~~~~~~~~ main.cpp:42:6: warning: variable 'secondTime' set but not used [-Wunused-but-set-variable] int secondTime = 1; ^~~~~~~~~~ main.cpp: In function 'void solve()': main.cpp:77:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (x <= v1.size()) ~~^~~~~~~~~~~~