Compilare: main.cpp: In function 'int main()': main.cpp:33:10: warning: statement has no effect [-Wunused-value] for(i;i>1;i){ ^ main.cpp:33:15: warning: for increment expression has no effect [-Wunused-value] for(i;i>1;i){ ^ main.cpp:12:13: warning: unused variable 'k' [-Wunused-variable] int n,e,k,m,i,j; ^ main.cpp:15:29: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&n,&e); ^