Compilare: user.cpp: In function ‘void dfs1(int)’: user.cpp:18:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[k].size(); i++) ^ user.cpp: In function ‘void dfs2(int)’: user.cpp:32:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < vt[k].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:75:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0 ; j < v[k].size(); j++) ^ user.cpp:97:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0;i < gt[k].size(); i++) ^ user.cpp:123:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0 ; i < Q[maxDist].size(); i++) ^ user.cpp:127:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < g[k].size(); j++) ^ user.cpp:148:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < sol.size(); i++) ^