Compilare: main.cpp: In function 'void eliminate(std::vector<std::__cxx11::basic_string<char> >, std::vector<std::__cxx11::basic_string<char> >&)': main.cpp:72:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<v1.size(); i++){ ~^~~~~~~~~~ main.cpp:74:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<v1.size(); j++){ ~^~~~~~~~~~ main.cpp: In function 'void build(std::vector<std::__cxx11::basic_string<char> >&)': main.cpp:97:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<v.size(); i++){ ~^~~~~~~~~ main.cpp:98:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<v.size(); j++){ ~^~~~~~~~~ main.cpp: In function 'void build_ans()': main.cpp:172:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<ind.size(); i++){ ~^~~~~~~~~~~ main.cpp:174:70: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j= (((int)v[ind[i] ].length())-1-g[ind[i-1] ][ind[i] ]+1); j<v[ind[i] ].length(); j++ ){ ~^~~~~~~~~~~~~~~~~~~~