Compilare: user.cpp: In function ‘int32_t main()’: user.cpp:49:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<t.size();i++) fl=min(fl,c[t[i-1]][t[i]]-f[t[i-1]][t[i]]); ^ user.cpp:50:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<t.size();i++) f[t[i-1]][t[i]]+=fl; ^