Compilare: user.cpp: In function ‘int main()’: user.cpp:13:24: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[1000001]’ [-Wformat=] fscanf(in, "%s", &v); ^ user.cpp:12:20: warning: unused variable ‘j’ [-Wunused-variable] int sf = 0, i, j; ^ user.cpp:11:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d\n", &n, &m); ^ user.cpp:13:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%s", &v); ^