Compilare: user.cpp: In function ‘int main()’: user.cpp:89:29: warning: format ‘%d’ expects argument of type ‘int*’, but argument 3 has type ‘char (*)[21]’ [-Wformat=] fscanf (fin, "%d", &s[i]); ^ user.cpp:93:31: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long long int’ [-Wformat=] fprintf (fout, "%d\n", sol); ^ user.cpp:86:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d", &c); ^ user.cpp:87:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d%d", &n, &m); ^ user.cpp:89:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d", &s[i]); ^ user.cpp: In function ‘void perm1(int)’: user.cpp:52:5: warning: ‘j’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (j > m) { ^