Compilare: main.cpp: In function 'int zet()': main.cpp:58:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i=0;i<s.size();i++ ) ~^~~~~~~~~ main.cpp:64:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while( 0<=i-z[i] && i+z[i]<=s.size()-1 && s[i-z[i]]==s[i+z[i]] ) ~~~~~~^~~~~~~~~~~~ main.cpp:60:9: warning: unused variable 'l' [-Wunused-variable] int l; ^ main.cpp:77:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'char nextch()': main.cpp:22:29: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buff,1,BUFF,stdin); ^ main.cpp: In function 'int main()': main.cpp:81:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen( "pscpld.in", "r", stdin ); ^ main.cpp:82:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen( "pscpld.out", "w", stdout ); ^