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View Compilation Error

0_0_36002924_12449.cpp:27:2: error: expected unqualified-id before 'int'
  int pos=0;
  ^
0_0_36002924_12449.cpp: In function 'bool cmp(node, node)':
0_0_36002924_12449.cpp:30:24: error: 'struct node' has no member named 'pos'
  if(a.x==b.x) return a.pos<b.pos;
                        ^
0_0_36002924_12449.cpp:30:30: error: 'struct node' has no member named 'pos'
  if(a.x==b.x) return a.pos<b.pos;
                              ^
0_0_36002924_12449.cpp: In function 'int main()':
0_0_36002924_12449.cpp:42:25: error: 'struct node' has no member named 'pos'
    a[i].x=sum[i]%p;a[i].pos=i;
                         ^
0_0_36002924_12449.cpp:47:33: error: 'struct node' has no member named 'pos'
    while(!dq.empty()&&dq.back().pos>a[i].pos) dq.pop_back();
                                 ^
0_0_36002924_12449.cpp:47:42: error: 'struct node' has no member named 'pos'
    while(!dq.empty()&&dq.back().pos>a[i].pos) dq.pop_back();
                                          ^
0_0_36002924_12449.cpp:50:20: error: 'struct node' has no member named 'pos'
    ll tmp=sum[a[i].pos]-sum[dq.front().pos-1];
                    ^
0_0_36002924_12449.cpp:50:40: error: 'struct node' has no member named 'pos'
    ll tmp=sum[a[i].pos]-sum[dq.front().pos-1];
                                        ^


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