Compilare: main.cpp: In function 'int main()': main.cpp:45:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(it+1>=l[q.top().c].size()) ~~~~^~~~~~~~~~~~~~~~~~~~~ main.cpp:58:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(it+1>=l[q.top().c].size()) ~~~~^~~~~~~~~~~~~~~~~~~~~ main.cpp:26:28: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d",&M,&N); ^ main.cpp:29:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&life); ^ main.cpp:32:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&anu); ^ main.cpp:71:32: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&querry); ^