Compilare: main.cpp: In function 'int main()': main.cpp:31:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; j<v[i].size()-1 ; j++){ ~^~~~~~~~~~~~~~ main.cpp:15:19: warning: unused variable 'x' [-Wunused-variable] int p,n,m,dst,x,y,up,down,mini,i,j; ^ main.cpp:15:21: warning: unused variable 'y' [-Wunused-variable] int p,n,m,dst,x,y,up,down,mini,i,j; ^ main.cpp:16:42: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d%d%d",&p,&n,&m,&dst); ^ main.cpp:18:53: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&w[i].first,&w[i].second); ^