标签:har bsp property pre case 树状 col prope word
??题目地址:http://acm.hdu.edu.cn/showproblem.php?pid=1166 ??
最简单的树状数组
#include <iostream>
#include <cstdio>
#include <cmath>
#include <cstring>
using namespace std;
typedef long long LL;
const int Max_n=100005;
int d[Max_n],n;
void add(int x,int v){
while(x<=n){
d[x]+=v;
x+=(x&-x);
}
}
int quary(int x){
int ans=0;
while(x){
ans+=d[x];
x-=(x&-x);
}
return ans;
}
int main() {
int t;
scanf("%d",&t);
for(int cnt=1;cnt<=t;cnt++){
scanf("%d",&n);
memset(d,0,sizeof(d));
int x=0;
for(int i=1;i<=n;i++){
scanf("%d",&x);
add(i,x);
}
char opt[20];
int l,r,ans=0;
printf("Case %d:\n",cnt);
while(~scanf("%s",opt)&&opt[0]!=‘E‘){
scanf("%d%d",&l,&r);
if(opt[0]==‘Q‘){
ans=quary(r)-quary(l-1);
printf("%d\n",ans);
}else if(opt[0]==‘S‘){
add(l,-r);
}else{
add(l,r);
}
}
}
return 0;
}
标签:har bsp property pre case 树状 col prope word
原文地址:https://www.cnblogs.com/zut-syp/p/10543658.html