Compilare: main.cpp: In function 'bool match(int, int)': main.cpp:67:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<child[1][a].size();i++) ~^~~~~~~~~~~~~~~~~~~ main.cpp:91:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(val>child[2][b].size()) ~~~^~~~~~~~~~~~~~~~~~~ main.cpp:93:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] return val==child[2][b].size(); ~~~^~~~~~~~~~~~~~~~~~~~ main.cpp:44:10: warning: variable 'found' set but not used [-Wunused-but-set-variable] bool found=0; ^~~~~