Compilare: main.cpp: In function 'double solve()': main.cpp:35:13: warning: unused variable 'elem' [-Wunused-variable] int i , elem , cnt , aux; ^~~~ main.cpp: In function 'int main()': main.cpp:81:25: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&n); ^ main.cpp:85:54: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d%d",&v[i].a,&v[i].b,&v[i].c); ^