glass_goldfish @ 2024-12-12 20:44:04
#include<bits/stdc++.h>
#define int long long
#define INF 0x3f3f3f
using namespace std;
int n,q,a[300001];
int w[300001],lzy[300001];
void build(int u,int l,int r){
if(l==r)w[u]=a[u];
else{
int mid=(l+r)>>1;
build(2*u,l,mid);build(2*u+1,mid+1,r);
w[u]=w[2*u]+w[2*u+1];
}
}
void update(int u,int nl,int nr,int l,int r,int k){
if(nl>r||nr<l)return;
else if(nl>=l&&nr<=r){
lzy[u]+=k;
w[u]+=(nl-nr+1)*k;
}
else{
int mid=(nl+nr)>>1;
lzy[u*2]+=lzy[u];
w[u*2]+=(lzy[u]*(mid-nl+1));
lzy[u*2+1]+=lzy[u];
w[u*2+1]+=(lzy[u]*(nr-mid+1));
lzy[u]=0;
update(u*2,nl,mid,l,r,k);
update(u*2+1,mid+1,nr,l,r,k);
w[u]=w[u*2]+w[u*2+1];
}
}
int query(int u,int nl,int nr,int l,int r){
if(nl>r||nr<l)return 0;
else if(nl>=l&&nr<=r)return w[u];
else{
int mid=(nl+nr)>>1;
lzy[u*2]+=lzy[u];
w[u*2]+=(lzy[u]*(mid-nl+1));
lzy[u*2+1]+=lzy[u];
w[u*2+1]+=(lzy[u]*(nr-mid+1));
lzy[u]=0;
int p=query(u*2,nl,mid,l,r)+query(u*2+1,mid+1,nr,l,r);
return p;
}
}
signed main(){
cin>>n>>q;
for(int i=1;i<=n;i++)
cin>>a[i];
build(1,1,n);
while(q--){
int opt,x,y,k;
cin>>opt>>x>>y;
if(opt==1){
cin>>k;
update(1,1,n,x,y,k);
}
else{
cout<<query(1,1,n,x,y)<<"\n";
}
}
return 0;
}
by Addicted_Game @ 2024-12-12 20:46:26
if(l==r)w[u]=a[u]; 改成 if(l==r)w[u]=a[l];
by Addicted_Game @ 2024-12-12 20:47:14
不过应该还有错误
by glass_goldfish @ 2024-12-12 20:47:40
@Addicted_Game 感谢(求壶关
by glass_goldfish @ 2024-12-12 20:48:14
@Addicted_Game 可惜还是 WA 0
by Addicted_Game @ 2024-12-12 20:52:08
你看看你自己的nl,nr,l,r,可能有些写混了,还有大于小于
by Down_syndrome @ 2024-12-12 20:52:23
@glass_goldfish 标记下传时右端点的长度是 nr-mid
而不是 nr-mid+1
。
by glass_goldfish @ 2024-12-12 20:54:14
@Down_syndrome 改了还是 WA 0
by Down_syndrome @ 2024-12-12 20:58:25
@glass_goldfish 逆天你 update
写的 nl-nr+1
。
by Down_syndrome @ 2024-12-12 21:00:12
@glass_goldfish 改了就过了。
by glass_goldfish @ 2024-12-12 21:00:31
@Down_syndrome AC 了,感谢!(求壶关