Compilare: user.cpp: In function ‘int main()’: user.cpp:22:61: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] for (int i=1;i<=m;++i) x=read(),y=read(),v[i] = x << 16 + y; ^ user.cpp: In function ‘int read()’: user.cpp:10:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",c+1); ^ user.cpp: In function ‘int main()’: user.cpp:18:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("saracsaurege.in","r",stdin); ^ user.cpp:19:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("saracsaurege.out","w",stdout); ^