Compilare: main.cpp: In function 'void Do()': main.cpp:33:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < A.size(); ++i ) ~~^~~~~~~~~~ main.cpp:39:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while( i < A.size() && A[i] == '>' ) ~~^~~~~~~~~~ main.cpp:46:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int k = nr.size() - target; k < nr.size(); ++k ) ~~^~~~~~~~~~~ main.cpp:57:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if( sir.size() < i + 1 ) ~~~~~~~~~~~^~~~~~~ main.cpp:80:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < sir.size(); ++i ) ~~^~~~~~~~~~~~ main.cpp:31:7: warning: unused variable 'j' [-Wunused-variable] int j, target; ^