Compilare: user.cpp: In function ‘void DFS(int)’: user.cpp:18:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[x].size();i++) ^ user.cpp: In function ‘void Kosaraju()’: user.cpp:40:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(t=0;t<vt[x].size();t++) ^ user.cpp: In function ‘void CompGraph()’: user.cpp:56:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] { for(j=0;j<c[i].size();j++) ^ user.cpp:58:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(t=0;t<v[x].size();t++) ^ user.cpp:63:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<cg[i].size();j++) ^ user.cpp: In function ‘void Solve()’: user.cpp:73:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<cg[i].size();j++) ^ user.cpp:99:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(t=0;t<cg[x].size();t++) ^ user.cpp: In function ‘int main()’: user.cpp:174:9: warning: unused variable ‘j’ [-Wunused-variable] { int i,j,x,y; ^