Compilare: user.cpp: In function ‘int main()’: user.cpp:27:7: warning: unused variable ‘rez’ [-Wunused-variable] int rez = 0, x = 0, y = 0; ^ user.cpp:9:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &n, &m); ^ user.cpp:12:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &ma[2 * i][2 * j]); ^