Compilare: user.cpp: In function ‘int main()’: user.cpp:34:35: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(xs[i]>xs[j] || xs[i]==xs[j] && ys[i]>=ys[j]){ ^ user.cpp:46:35: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(xt[i]>xt[j] || xt[i]==xt[j] && yt[i]>=yt[j]){ ^ user.cpp:56:6: warning: unused variable ‘solution’ [-Wunused-variable] int solution=-1; ^ user.cpp:57:6: warning: unused variable ‘solution1’ [-Wunused-variable] int solution1=-1; ^ user.cpp:58:6: warning: unused variable ‘lower_bound’ [-Wunused-variable] int lower_bound=0; ^ user.cpp:59:6: warning: unused variable ‘upper_bound’ [-Wunused-variable] int upper_bound=m-1; ^ user.cpp:60:6: warning: unused variable ‘i’ [-Wunused-variable] int i; ^