题意 分析 动态加点线段树,标记永久化好写常数小 Code #includebits/stdc++.h#define fi first#define se second#define lson l,mid,p1#define rson mid+1,r,p1|1#define pb push_back#define ll long longusing namespace std;const
题意
分析
动态加点线段树,标记永久化好写常数小
Code
#include<bits/stdc++.h> #define fi first #define se second #define lson l,mid,p<<1 #define rson mid+1,r,p<<1|1 #define pb push_back #define ll long long using namespace std; const ll inf=1e18; const int mod=1e9+7; const int maxn=1e7+10; int n,m; ll tr[maxn]; int ls[maxn],rs[maxn],tag[maxn],tot; int rt; void up(ll x,ll y,ll l,ll r,int &p,ll k){ tr[++tot]=(tr[p]+(y-x+1)%mod*k%mod)%mod; ls[tot]=ls[p],rs[tot]=rs[p],tag[tot]=tag[p],p=tot; if(x==l&&y==r){ tag[p]=(tag[p]+k)%mod; return; }ll mid=l+r>>1; if(y<=mid) up(x,y,l,mid,ls[p],k); else if(x>mid) up(x,y,mid+1,r,rs[p],k); else up(x,mid,l,mid,ls[p],k),up(mid+1,y,mid+1,r,rs[p],k); } ll qy(ll x,ll y,ll l,ll r,int p,ll k){ if(x==l&&y==r){ return (tr[p]+(y-x+1)%mod*k%mod)%mod; }ll mid=l+r>>1; if(y<=mid) return qy(x,y,l,mid,ls[p],(k+tag[p])%mod); else if(x>mid) return qy(x,y,mid+1,r,rs[p],(k+tag[p])%mod); else return (qy(x,mid,l,mid,ls[p],(k+tag[p])%mod)+qy(mid+1,y,mid+1,r,rs[p],(k+tag[p])%mod))%mod; } int main(){ //ios::sync_with_stdio(false); //freopen("in","r",stdin); cin>>m; for(int i=1,op;i<=m;i++){ ll x,l,r;scanf("%d%lld%lld",&op,&l,&r); if(op==1){ scanf("%lld",&x); x%=mod; up(l,r,1,inf,rt,x); }else{ printf("%lld\n",qy(l,r,1,inf,rt,0)); } } return 0; }