Compilare: user.cpp: In function ‘int dfs(int)’: user.cpp:21:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<g[i].size(); ++j)if(!viz[g[i][j]])n+=dfs(g[i][j]); ^ user.cpp: In function ‘int dfst(int)’: user.cpp:28:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<gt[i].size(); ++j)if(!viz[gt[i][j]])n+=dfst(gt[i][j]); ^ user.cpp: In function ‘int main()’: user.cpp:52:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<d.size(); ++i)printf("%d ", d[i]); ^ user.cpp:41:15: warning: unused variable ‘k’ [-Wunused-variable] int i, j, k, x; ^ user.cpp:41:18: warning: unused variable ‘x’ [-Wunused-variable] int i, j, k, x; ^ user.cpp:42:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("drumuri5.in", "r", stdin); ^ user.cpp:43:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("drumuri5.out", "w", stdout); ^ user.cpp:44:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ user.cpp:46:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &i, &j); ^