Compilare: user.cpp: In function ‘int main()’: user.cpp:14:20: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[500008]’ [-Wformat=] scanf("%s",&sir); ^ user.cpp:27:13: warning: unused variable ‘b’ [-Wunused-variable] int b=1; ^ user.cpp:8:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("string.in","r",stdin); ^ user.cpp:9:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("string.out","w",stdout); ^ user.cpp:13:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:14:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",&sir); ^ user.cpp:54:25: warning: ‘q’ may be used uninitialized in this function [-Wmaybe-uninitialized] int w=(q>>(st-i)); ^