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#include <iostream> #include <cstdio> #include <cstring> #include <string> #include <vector> #define ll long long #define sz 250005 using namespace std; struct segment{ ll left,right; ll len; ll first_inc,last_inc; ll totalAB; bool isSetvalue; ll cary; ll sum; }; segment arr[sz*4]; void changeAB(ll frist_incr,ll last_incr,int node,ll step) { arr[node].totalAB += step; arr[node].first_inc += frist_incr; arr[node].last_inc += last_incr; arr[node].sum += ((frist_incr+last_incr)*arr[node].len)/2; } void changeC(int node,ll val) { arr[node].sum = arr[node].len*val; arr[node].isSetvalue=1; arr[node].cary=val; arr[node].totalAB=0; arr[node].first_inc=0; arr[node].last_inc=0; } void propagate(int node) { ll add1 = arr[node].first_inc; ll add2 = arr[node].last_inc; ll step = arr[node].totalAB; if(arr[node].isSetvalue) { ll Left=2*node; ll Right=2*node+1; changeC(Left,arr[node].cary); changeC(Right,arr[node].cary); arr[node].isSetvalue=0; arr[node].cary=0; } if(add1 || add2 || step) { ll Left=2*node; ll Right=2*node+1; ll mid=add1+step*(arr[Left].len-1); changeAB(add1,mid,Left,step); changeAB(mid+step,add2,Right,step); arr[node].first_inc=0; arr[node].last_inc=0; arr[node].totalAB=0; } } //update node for the range void updateAB(int node,int i,int j,ll step) { ll Left=arr[node].left,Right=arr[node].right,mid; ll first_inc,last_inc; if(i>Right || j<Left) { return; } if(i<=Left && j>=Right) { ll k = step; if(step>=0) { first_inc = (Left-i+1); last_inc = (Right-i+1); } else { first_inc = (j-Left+1); last_inc = (j-Right+1); } changeAB(first_inc,last_inc,node,k); return; } else { propagate(node); Left=2*node; Right=(node<<1) | 1; updateAB(Left, i, j,step); updateAB(Right, i, j,step); arr[node].sum = arr[Left].sum+arr[Right].sum; return; } return; } void updateC(int node,int i,int j,ll val) { ll Left,Right,mid; ll b=arr[node].left; ll e=arr[node].right; if(i>e || j<b) return; else if(i<=b && j>=e) { arr[node].sum = (val*(e-b+1)); arr[node].cary=val; arr[node].isSetvalue=1; arr[node].totalAB=0; arr[node].first_inc=0; arr[node].last_inc=0; return; } else { propagate(node); Left = 2*node; Right = Left+1; mid = (b+e)>>1; updateC(Left,i,j,val); updateC(Right,i,j,val); arr[node].sum = (arr[Left].sum+arr[Right].sum); return; } return; } ll query(int node,int i,int j) { ll b = arr[node].left; ll e = arr[node].right; if(i>e || j<b) { return 0; } if(i<=b && j>=e) { return arr[node].sum; } propagate(node); ll Left = node<<1; ll Right = Left+1; ll p1 = query(Left, i, j); ll p2 = query(Right, i, j); return p1+p2; } void _init(int b,int e,int node) { arr[node].sum=0; arr[node].len=e-b+1; arr[node].totalAB=0; arr[node].cary=0; arr[node].first_inc=0; arr[node].last_inc=0; arr[node].isSetvalue=0; arr[node].left=b;arr[node].right=e; if(b!=e) { int mid=(b+e)/2; _init(b,mid,node<<1); _init(mid+1,e,(node<<1)|1); } } int main() { int t; string s; int start,end,val; while(scanf("%d",&t)!=EOF) { _init(1,sz-5,1); while(t--) { cin>>s; if(s[0]=='A') { cin>>start>>end; updateAB(1,start,end,1);//+1 increment increasing ascending order } else if(s[0]=='B') { cin>>start>>end; updateAB(1,start,end,-1);//-1 increment decreasing ascending order } else if(s[0]=='C') { cin>>start>>end>>val; updateC(1,start,end,val); } else if(s[0]=='S') { cin>>start>>end; cout<<query(1,start,end)<<"\n"; } } } return 0; } |
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