/in/foo.cc:4:1: error: 'll' does not name a type
 ll C[100002],R[100002];
 ^~
/in/foo.cc:5:6: error: 'll' was not declared in this scope
 pair<ll,ll>P[100002];
      ^~
/in/foo.cc:5:9: error: 'll' was not declared in this scope
 pair<ll,ll>P[100002];
         ^~
/in/foo.cc:5:11: error: template argument 1 is invalid
 pair<ll,ll>P[100002];
           ^
/in/foo.cc:5:11: error: template argument 2 is invalid
/in/foo.cc: In function 'int main()':
/in/foo.cc:12:37: error: 'C' was not declared in this scope
  for(int i=1;i<=N;i++)scanf("%lld",&C[i]);
                                     ^
/in/foo.cc:13:46: error: request for member 'second' in 'P[i]', which is of non-class type 'int'
  for(int i=1;i<=M;i++)scanf("%lld%lld",&P[i].second,&P[i].first);
                                              ^~~~~~
/in/foo.cc:13:59: error: request for member 'first' in 'P[i]', which is of non-class type 'int'
  for(int i=1;i<=M;i++)scanf("%lld%lld",&P[i].second,&P[i].first);
                                                           ^~~~~
/in/foo.cc:14:37: error: 'R' was not declared in this scope
  for(int i=1;i<=K;i++)scanf("%lld",&R[i]);
                                     ^
/in/foo.cc:15:7: error: 'C' was not declared in this scope
  sort(C+1,C+N+1);
       ^
/in/foo.cc:17:7: error: 'R' was not declared in this scope
  sort(R+1,R+K+1);
       ^
/in/foo.cc:19:2: error: 'll' was not declared in this scope
  ll sc=0,sr=0,sp=0;
  ^~
/in/foo.cc:20:24: error: 'sr' was not declared in this scope
  for(int i=i;i<=N;i++) sr+=R[i];
                        ^~
/in/foo.cc:21:17: warning: unused variable 'j' [-Wunused-variable]
     for(int i=N,j=M;i>0;i--){  //前i头牛用于出租，后N-i头牛用于产奶 
                 ^