Compilare: main.cpp: In function 'int main()': main.cpp:53:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[nd][0].size() && x==1;i++){ ~^~~~~~~~~~~~~~~~ main.cpp:21:25: warning: unused variable 'rsp' [-Wunused-variable] int t,n,m,k,i,a,b,c,rsp,nd,val,x,coun,val2,nd2; ^~~ main.cpp:25:23: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d",&t); ^ main.cpp:28:37: 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:32:37: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d",&dist[i]); ^ main.cpp:35:41: 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,&c); ^