Compilare: main.cpp: In function 'int calcul(int, int, int)': main.cpp:29:20: warning: unused variable 'x1' [-Wunused-variable] int mijl,lch,rch,x1,x2; ^~ main.cpp:29:23: warning: unused variable 'x2' [-Wunused-variable] int mijl,lch,rch,x1,x2; ^~ main.cpp: In function 'int main()': main.cpp:48:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<a[x].size();i++){ ~^~~~~~~~~~~~ main.cpp: In function 'int update(int, int, int)': main.cpp:27:1: warning: control reaches end of non-void function [-Wreturn-type] } ^