Compilare: main.cpp: In function 'int main()': main.cpp:32:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<sir[i].size();j++) ~^~~~~~~~~~~~~~ main.cpp:40:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(d[dif]>sir[i].size()) ~~~~~~^~~~~~~~~~~~~~ main.cpp:57:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(d[dif]>d[x]+sir[i].size()) ~~~~~~^~~~~~~~~~~~~~~~~~~