rotate.cpp: In function 'void energy(int, std::vector<int>)':
rotate.cpp:9:28: error: expected ';' before 'for'
9 | sort(p.begin(),p.end())
| ^
| ;
10 | for (int i=0;i<n/2;++i) rotate({p[i].second+n/2},p[i].first+25000-p[i+i/2].first);
| ~~~
rotate.cpp:10:18: error: 'i' was not declared in this scope
10 | for (int i=0;i<n/2;++i) rotate({p[i].second+n/2},p[i].first+25000-p[i+i/2].first);
| ^
rotate.cpp:10:53: error: expected primary-expression before ',' token
10 | for (int i=0;i<n/2;++i) rotate({p[i].second+n/2},p[i].first+25000-p[i+i/2].first);
| ^