Compilare: user.cpp: In function ‘int main()’: user.cpp:65:28: warning: unused variable ‘x’ [-Wunused-variable] int n, m,a[maxn][maxn],x,y; ^ user.cpp:65:30: warning: unused variable ‘y’ [-Wunused-variable] int n, m,a[maxn][maxn],x,y; ^ user.cpp: In function ‘bool test(int (*)[50], int, int)’: user.cpp:37:1: warning: control reaches end of non-void function [-Wreturn-type] } ^