Compilare: main.cpp: In function 'void dfs(int)': main.cpp:17:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < edge[nod].size(); i++ ) ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:61:40: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d%d", &N, &M, &Q ); ^ main.cpp:63:48: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] int x, y; fscanf( fin, "%d%d", &x, &y ); ^ main.cpp:75:59: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] int op, x, y; fscanf( fin, "%d%d%d", &op, &x, &y ); ^