Compilare: user.cpp: In function ‘int main()’: user.cpp:77:54: warning: suggest parentheses around arithmetic in operand of ‘^’ [-Wparentheses] take = matr[lq[i]][cq[i]] - matr[lq[i]][cq[i]] ^ sg; ^ user.cpp:62:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^ user.cpp:65:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &lin, &col); ^