Compilare: user.cpp: In function ‘int main()’: user.cpp:58:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[c.y].size(); i++){ ^ user.cpp:42:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d %d", &n, &m); ^ user.cpp:46:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d %d %d", &s, &e, &c); ^