线段树区改区查标记永久化板子

た入场券 2023-06-02 13:58 10阅读 0赞

打一次错一次qvq

#include<cstdio>
    #include<algorithm>
    #define int long long
    using namespace std;
    
    inline void input(int &x){
        int ans=0,f=1;
        char c=getchar();
        while(c>'9'||c<'0'){
            if(c=='-')f=-1;
            c=getchar();
        }
        while(c>='0'&&c<='9'){
            ans=ans*10+c-48;
            c=getchar();
        }
        x=ans*f;
    }
    
    inline void output(int x){
        if(x<0)x=-x,putchar('-');
        if(x>9)output(x/10);
        putchar(x%10+48);
    }
    
    inline void writeln(int x){
        output(x);
        putchar('\n');
    }
    
    int n,m,a[100005],c[400005],addsum[400005];
    
    inline void build(int k,int l,int r){
        if(l==r){
            c[k]=a[l];
            return;
        }
        int mid=(l+r)>>1;
        build(k<<1,l,mid);
        build(k<<1|1,mid+1,r);
        c[k]=c[k<<1]+c[k<<1|1];
    }
    
    inline void fix(int k,int l,int r,int xl,int xr,int x){
        if(xl<=l&&r<=xr){//顺序 
            addsum[k]+=x;
            return;
        }
        int mid=(l+r)>>1;
        if(xl<=mid)fix(k<<1,l,mid,xl,xr,x);
        if(xr>=mid+1)fix(k<<1|1,mid+1,r,xl,xr,x);
        c[k]+=(min(xr,r)-max(xl,l)+1)*x;//+1
    }
    
    inline int query(int k,int l,int r,int xl,int xr){
        if(xl<=l&&r<=xr){
            return c[k]+(min(xr,r)-max(xl,l)+1)*addsum[k];
        }
        int mid=(l+r)>>1,ans=(min(xr,r)-max(xl,l)+1)*addsum[k];
        if(xl<=mid)ans+=query(k<<1,l,mid,xl,xr);
        if(xr>=mid+1)ans+=query(k<<1|1,mid+1,r,xl,xr);
        return ans;
    }
    
    signed main(){
        input(n);input(m);
        for(int i=1;i<=n;i++)input(a[i]);
        build(1,1,n);
        for(int i=1;i<=m;i++){
            int opt,x,y,k;
            input(opt);
            if(opt==1){
                input(x);input(y);input(k);
                fix(1,1,n,x,y,k);
            }
            else{
                input(x);input(y);\
                writeln(query(1,1,n,x,y));
            }
        }
    }

转载于:https://www.cnblogs.com/Y15BeTa/p/11400178.html