Compilare: user.cpp: In function ‘void DFS(int, int)’: user.cpp:169:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < dist.size(); ++i) ^ user.cpp: In function ‘int main(int, const char**)’: user.cpp:198:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d %d %d", &N, &M, &Q); ^ user.cpp:209:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d %d %d", &x, &y, &v); ^ user.cpp:225:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d %d", &x, &y); ^