线段树1模板

 1 #include<cstdio>
 2 
 3 const int MAXN = 200000*4;
 4 typedef long long LL;
 5 
 6 int n,m,p,u,v;
 7 long long x,Segment_Tree[MAXN],Add[MAXN];
 8 
 9 template <typename Type> inline void Read(Type &in){
10     Type f=1;char ch=getchar();
11     for(;ch>‘9‘||ch<‘0‘;ch=getchar()) if(ch==‘-‘) f=-1;
12     for(in=0;ch>=‘0‘&&ch<=‘9‘;ch=getchar()) in=in*10+ch-‘0‘;
13     in*=f;
14 }
15 
16 void Build(int Node,int Left,int Right){
17     if(Left==Right){
18         Read(Segment_Tree[Node]);
19         return;
20     }
21     int Mid=(Left+Right)>>1;
22     Build(Node<<1,Left,Mid);
23     Build(Node<<1|1,Mid+1,Right);
24     Segment_Tree[Node]=Segment_Tree[Node<<1]+Segment_Tree[Node<<1|1];
25 }
26 
27 void PushDown(int Node,int Begin,int End){
28     if(!Add[Node]) return;
29     int Mid=(Begin+End)>>1;
30     Add[Node<<1]+=Add[Node];
31     Add[Node<<1|1]+=Add[Node];
32     Segment_Tree[Node<<1]+=(Mid+1-Begin)*Add[Node];
33     Segment_Tree[Node<<1|1]+=(End-Mid)*Add[Node];
34     Add[Node]=0;
35 }
36 
37 void Change(int Node,int Begin,int End,int Left,int Right,LL Add_Num){
38     if(Begin>Right||End<Left) return;
39     if(Begin>=Left&&End<=Right){
40         Segment_Tree[Node]+=(End-Begin+1)*Add_Num;
41         Add[Node]+=Add_Num;
42     }
43     else{
44         if(Add[Node]) PushDown(Node,Begin,End);
45         int Mid=(Begin+End)>>1;
46         Change(Node<<1,Begin,Mid,Left,Right,Add_Num);
47         Change(Node<<1|1,Mid+1,End,Left,Right,Add_Num);
48         Segment_Tree[Node]=Segment_Tree[Node<<1]+Segment_Tree[Node<<1|1];
49     }
50 }
51 
52 LL Query(int Node,int Begin,int End,int Left,int Right){
53     if(Begin>Right||End<Left) return 0;
54     if(Begin>=Left&&End<=Right) return Segment_Tree[Node];
55     if(Add[Node]) PushDown(Node,Begin,End);
56     int Mid=(Begin+End)>>1;
57     return Query(Node<<1,Begin,Mid,Left,Right)+Query(Node<<1|1,Mid+1,End,Left,Right);
58 }
59 
60 int main(){
61     Read(n);
62     Build(1,1,n);Read(m);
63     while(m--){
64         Read(p);Read(u);Read(v);
65         if(p==1){
66             Read(x);
67             Change(1,1,n,u,v,x);
68         }
69         else printf("%lld\n",Query(1,1,n,u,v));
70     }
71     return 0;
72 }