Compilare: main.cpp: In function 'void bfs(int, int)': main.cpp:16:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<g[nod].size(); i++){ ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:37:36: 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, &k); ^ main.cpp:39:32: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &a, &b); ^ main.cpp:46:26: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &a); ^