Compilare: user.cpp: In function ‘void c2(int, int, int)’: user.cpp:17:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(a[n][i]>=st) ^ user.cpp:32:75: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(a[n-i][n-d[i+1]-1]>a[n-i][n-d[i+1]-2]&&a[n-d[i+1]-1][n-i]>=dif) ^ user.cpp:55:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(a[n][i]>=st) ^ user.cpp:26:9: warning: unused variable ‘bi’ [-Wunused-variable] int bi=0; ^ user.cpp: In function ‘int main()’: user.cpp:69:19: warning: unused variable ‘x’ [-Wunused-variable] int v,n,st,dr,x,ct=0,nr; ^ user.cpp: In function ‘void c2(int, int, int)’: user.cpp:43:12: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] x--; ^