Compilare: main.cpp: In function 'void DFS(int)': main.cpp:15:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( i = 0; i < adjl[node].size(); ++i ) { ~~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:25:22: warning: unused variable 'j' [-Wunused-variable] int n, m, x, y, i, j, comp; ^ main.cpp:27:32: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d", &n, &m ); ^ main.cpp:29:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d", &x, &y ); ^