Compilare: main.cpp: In function 'int main()': main.cpp:62:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<nod[na][0].size();j++){ ~^~~~~~~~~~~~~~~~~~ main.cpp:26:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d%d",&n,&m,&k); ^ main.cpp:28:31: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d",&sv[i]); ^ main.cpp:32:37: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d%d",&a,&b,&q); ^