Compilare: user.cpp: In function ‘void Backtr(int, int)’: user.cpp:120:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<solutii[cheie].size();j++) ^ user.cpp:235:44: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if(valori[lin] >> (ix) & 1 != j) ^ user.cpp: In function ‘void Read()’: user.cpp:50:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &x); ^ user.cpp:51:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^ user.cpp:55:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &o[i]); ^ user.cpp:60:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &v[i]); ^