Compilare: main.cpp: In function 'bool liber(int, int)': main.cpp:55:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int q = 0; q < v.size(); q++) ~~^~~~~~~~~~ main.cpp: In function 'void print()': main.cpp:65:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < x.size(); i++){ ~~^~~~~~~~~~ main.cpp:66:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 1; j < y.size(); j++) ~~^~~~~~~~~~ main.cpp: In function 'void calc()': main.cpp:73:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < x.size(); i++) ~~^~~~~~~~~~ main.cpp:74:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 1; j < y.size(); j++) ~~^~~~~~~~~~ main.cpp:80:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < x.size(); i++) ~~^~~~~~~~~~ main.cpp:81:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 1; j < y.size(); j++) ~~^~~~~~~~~~