Compilare: main.cpp: In function 'int main()': main.cpp:33:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;j<v[tp].size();j++) ~^~~~~~~~~~~~~ main.cpp:44:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j==v[tp].size()) s.pop(); ~^~~~~~~~~~~~~~ main.cpp:15:28: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d",&n,&m); ^ main.cpp:19:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d",&j,&k); ^