Compilare: main.cpp: In function 'int get_cost(int, char)': main.cpp:25:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<s[wh].size();i++) ~^~~~~~~~~~~~~ main.cpp: In function 'void get_flow()': main.cpp:55:19: warning: unused variable 't' [-Wunused-variable] int nod,minfl,t; ^ main.cpp: In function 'int main()': main.cpp:95:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<patt.size();i++) ~^~~~~~~~~~~~ main.cpp:138:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(flow==patt.size()) ~~~~^~~~~~~~~~~~~