Compilare: user.cpp: In function ‘int main()’: user.cpp:80:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i< v[0].v.size(); i++) ^ user.cpp:97:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i< v[arc.destinatie].v.size(); i++) ^ user.cpp:139:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<v[i].v.size(); j++){ ^ user.cpp:151:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i< v2[n+1].v.size(); i++) ^ user.cpp:169:51: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i< v2[arc.destinatie].v.size(); i++) ^ user.cpp:39:24: warning: unused variable ‘b’ [-Wunused-variable] int i, j, n, m, a, b, c; ^ user.cpp:39:27: warning: unused variable ‘c’ [-Wunused-variable] int i, j, n, m, a, b, c; ^