Compilare: user.cpp: In function ‘int elimin(int)’: user.cpp:11:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k==1||k==v.size()-1) ^ user.cpp: In function ‘int main()’: user.cpp:26:24: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[100001]’ [-Wformat=] scanf("%d\n%s",&cer,&s); ^ user.cpp:23:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("charlie.in","r",stdin); ^ user.cpp:24:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("charlie.out","w",stdout); ^ user.cpp:26:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n%s",&cer,&s); ^