Compilare: main.cpp: In function 'void f(int)': main.cpp:35:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int o=0;o<ve.size();o++) ~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:83:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d%d",&n,&m,&p); ^ main.cpp:86:32: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d",&a,&b); ^