Compilare: user.cpp: In function ‘int main()’: user.cpp:79:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(common[v[j]]) ^ user.cpp:47:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d", &n); ^ user.cpp:50:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d", &v[i]); ^ user.cpp:93:69: warning: array subscript is below array bounds [-Warray-bounds] inconfig = (inconfig + MOD - pw[normalised[v[j]]]) % MOD; ~~~~~~~~~~~~~~~~~~~^