Compilare: main.cpp: In function 'int main()': main.cpp:17:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( i = 0 ; i < sir.size() ; i++ ) ~~^~~~~~~~~~~~ main.cpp:21:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ( maxa == sir.size() ) ~~~~~^~~~~~~~~~~~~ main.cpp:31:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( i = 0 ; i < sir.size() ; i++ ) ~~^~~~~~~~~~~~ main.cpp:39:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while ( i!=j && ps < sir.size() ) ~~~^~~~~~~~~~~~ main.cpp:44:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ( j == sir.size() ) ~~^~~~~~~~~~~~~ main.cpp:60:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( i = 0 ; i < sir.size() ; i++ ) ~~^~~~~~~~~~~~ main.cpp:15:37: warning: unused variable 'vec' [-Wunused-variable] int i , maxa = -1 ,j,sol=0,ct=0,vec ,ps; ^~~