Compilare: main.cpp: In function 'void bkt(int)': main.cpp:10:7: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if( nr.size() >= a.size() ) ^ main.cpp: In function 'int main()': main.cpp:29:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < a.size(); i++ ) ~~^~~~~~~~~~ main.cpp:31:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < b.size(); i++ ) ~~^~~~~~~~~~