Compilare: main.cpp: In function 'int main()': main.cpp:26:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i=1;i<a.size();i++ ) ~^~~~~~~~~ main.cpp:39:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i=0;i<b.size();i++ ) ~^~~~~~~~~ main.cpp:47:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if( k==a.size() ) ~^~~~~~~~~~ main.cpp:20:7: warning: unused variable 'p' [-Wunused-variable] int p; ^ main.cpp:17:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen( "strmatch.in", "r", stdin ); ^ main.cpp:18:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen( "strmatch.out", "w", stdout ); ^