Compilare: user.cpp: In function ‘int main()’: user.cpp:53:85: warning: operation on ‘fct’ may be undefined [-Wsequence-point] while ((j<=i-y || query(j,fct=true)-query(j,fct=false)>z) && j<=i-x+1) ^ user.cpp:56:78: warning: operation on ‘fct’ may be undefined [-Wsequence-point] if (j<=i-x+1 || (query(j,fct=true)-query(j,fct=false)<=z)) ^ user.cpp:58:50: warning: ‘r’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (lg<=i-j+1 && (i-j+1>r-p+1 || (i-j+1==r-p+1 && j>p))) ^ user.cpp:58:50: warning: ‘p’ may be used uninitialized in this function [-Wmaybe-uninitialized]