Compilare: main.cpp: In function 'int main()': main.cpp:22:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<hT[md].size();++i) ~^~~~~~~~~~~~~~ main.cpp:34:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<hT[md].size();++i) ~^~~~~~~~~~~~~~ main.cpp:11:24: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&n); ^ main.cpp:14:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d",&t,&x); ^