Compilare: main.cpp: In function 'int main()': main.cpp:70:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[nod].size();i++){ ~^~~~~~~~~~~~~~ main.cpp: In function 'int cit()': main.cpp:24:32: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(BUFF,1,ct,fi); ^ main.cpp:33:32: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(BUFF,1,ct,fi); ^ main.cpp: In function 'int main()': main.cpp:50:24: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(BUFF,1,ct,fi); ^