Compilare: main.cpp: In function 'void useless()': main.cpp:15:9: warning: unused variable 'n' [-Wunused-variable] int n; return ; ^ main.cpp: In function 'void redo(int, int, int)': main.cpp:43:7: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] { if(k>=0) ^ main.cpp: In function 'int main()': main.cpp:63:9: warning: variable 'ni' set but not used [-Wunused-but-set-variable] int ni,nj; ^~ main.cpp:65:20: warning: unused variable 'rasp' [-Wunused-variable] pair <int,int> rasp[205]; ^~~~ main.cpp:66:9: warning: unused variable 'd' [-Wunused-variable] int d=1,ss=0; ^ main.cpp:66:13: warning: unused variable 'ss' [-Wunused-variable] int d=1,ss=0; ^~