Compilare: main.cpp: In function 'int reg(int*, int, int, int)': main.cpp:18:15: warning: unused variable 'j' [-Wunused-variable] int i,s=0,j; ^ main.cpp: In function 'int main()': main.cpp:39:22: warning: variable 's2' set but not used [-Wunused-but-set-variable] int c,n,m,s,s1=0,s2=0,i,j,x,r=0,v[50][50],t=INT_MAX,q=INT_MIN,k=0,minim,ok=1; ^~ main.cpp:39:31: warning: unused variable 'x' [-Wunused-variable] int c,n,m,s,s1=0,s2=0,i,j,x,r=0,v[50][50],t=INT_MAX,q=INT_MIN,k=0,minim,ok=1; ^ main.cpp:39:67: warning: unused variable 'k' [-Wunused-variable] int c,n,m,s,s1=0,s2=0,i,j,x,r=0,v[50][50],t=INT_MAX,q=INT_MIN,k=0,minim,ok=1; ^ main.cpp:39:71: warning: unused variable 'minim' [-Wunused-variable] int c,n,m,s,s1=0,s2=0,i,j,x,r=0,v[50][50],t=INT_MAX,q=INT_MIN,k=0,minim,ok=1; ^~~~~ main.cpp:43:14: warning: iteration 500000 invokes undefined behavior [-Waggressive-loop-optimizations] fr[i]=0; ~~~~~^~ main.cpp:41:14: note: within this loop for(i=0;i<=500000;i++) ~^~~~~~~~