Compilare: user.cpp: In function ‘void Init()’: user.cpp:96:16: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(a.a+1); ^ user.cpp:98:16: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(b.a+1); ^ user.cpp: In function ‘int main()’: user.cpp:103:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("unicat.in","r",stdin); ^ user.cpp:104:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("unicat.out","w",stdout); ^ user.cpp: In member function ‘void sir::Manacher1(int*)’: user.cpp:68:42: warning: ‘P’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(R>=i) dp[i]=min(R-i+1,dp[P-(i-P)]); ^ user.cpp: In member function ‘void sir::Manacher2(int*)’: user.cpp:80:39: warning: ‘P’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(R>i) dp[i]=min(R-i,dp[P-(i-P)]); ^ /tmp/ccnjwlXQ.o: In function `Init()': user.cpp:(.text+0x13d): warning: the `gets' function is dangerous and should not be used.