Compilare: main.cpp: In function 'int main()': main.cpp:147:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j+1<ids[i].size();j++) ~~~^~~~~~~~~~~~~~ main.cpp:153:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(cur[p_st]==wh[p_st].size()-1 || cur[p_dr]==wh[p_dr].size()-1) continue; ~~~~~~~~~^~~~~~~~~~~~~~~~~~~ main.cpp:153:69: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(cur[p_st]==wh[p_st].size()-1 || cur[p_dr]==wh[p_dr].size()-1) continue; ~~~~~~~~~^~~~~~~~~~~~~~~~~~~