Compilare: main.cpp: In function 'void solve()': main.cpp:48:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<sol.size(); i++) ~^~~~~~~~~~~ main.cpp:60:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<Sol.size(); i++) ~^~~~~~~~~~~ main.cpp:63:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<Sol[i].size(); j++) ~^~~~~~~~~~~~~~ main.cpp:14:9: warning: unused variable 'stg' [-Wunused-variable] int stg=0,nr=0,st; ^~~ main.cpp:14:20: warning: unused variable 'st' [-Wunused-variable] int stg=0,nr=0,st; ^~