Compilare: user.cpp: In function ‘void backtracking(int)’: user.cpp:28:3: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(valid(k))if(solutie(k))tipar(k); ^ user.cpp: In function ‘int main()’: user.cpp:33:7: warning: unused variable ‘j’ [-Wunused-variable] int i,j; ^ user.cpp: In function ‘void tipar(int)’: user.cpp:22:30: warning: array subscript is above array bounds [-Warray-bounds] s+=a[st[i]][1]/a[st[i]][2];} ^