标签:int span getchar using sqrt etc ++ else ||
1.区间加法,单点查询
#include<bits/stdc++.h> using namespace std; int n,opt,m,a[50005],vc,x,y,tg[50005],blo,tag[50005]; int read() { long long x=0,f=1;char ch=getchar(); while(ch<‘0‘||ch>‘9‘){if(ch==‘-‘)f=-1;ch=getchar();} while(ch>=‘0‘&&ch<=‘9‘){x=x*10+ch-‘0‘;ch=getchar();} return x*f; } int main() { cin>>n; blo=sqrt(n);m=n; for(int i=1;i<=n;i++)cin>>a[i],tag[i]=(i-1)/blo+1; while(m--) { opt=read();x=read();y=read();vc=read(); if(!opt) { for(int i=x;i<=min(blo*tag[x],y);i++)a[i]+=vc; if(tag[x]!=tag[y]) for(int i=blo*(tag[y]-1)+1;i<=y;i++)a[i]+=vc; for(int i=tag[x]+1;i<=tag[y]-1;i++)tg[i]+=vc; } else cout<<a[y]+tg[tag[y]]<<endl; } }
标签:int span getchar using sqrt etc ++ else ||
原文地址:https://www.cnblogs.com/SFWR-YOU/p/11519683.html