Compilare: main.cpp: In function 'int main()': main.cpp:25:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(it[i]<sir[i].size() && sir[i][ it[i] ]<nrcrt){ ~~~~~^~~~~~~~~~~~~~ main.cpp:28:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(it[i]<sir[i].size() && sir[i][ it[i] ]!=nrcrt){ ~~~~~^~~~~~~~~~~~~~ main.cpp:31:27: warning: self-comparison always evaluates to false [-Wtautological-compare] for(j=1; j<j; j++){ ~^~ main.cpp:34:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(it[j]>=sir[j].size()){ ~~~~~^~~~~~~~~~~~~~~ main.cpp:42:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(it[i]>=sir[i].size()){ ~~~~~^~~~~~~~~~~~~~~ main.cpp:52:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(it[i]>=sir[i].size()){ ~~~~~^~~~~~~~~~~~~~~ main.cpp:62:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<sol.size(); i++){ ~^~~~~~~~~~~