Compilare: user.cpp: In function ‘int main()’: user.cpp:55:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<sol.size()-1;++i) ^ user.cpp:71:58: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(ar[mid].a<sol[i] || ar[mid].a==sol[i] && ar[mid].b<sol[i+1]) ^ user.cpp:90:66: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(ar[mid].a<sol[i+1] || ar[mid].a==sol[i+1] && ar[mid].b<sol[i]) ^