技術標籤：資料結構總結

單點修改區間和查詢

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define maxn 500005
int n;
ll a[maxn];
ll query(int x)
{
    ll sum = 0;
    while(x){
        sum += a[x];
        x -= x & -x;
    }
    return sum;
}
void add(int x, int k)
{
    while (x <= n){
        a[
 
x] += k;
        x += x & -x;
    }
}
int main()
{
    int m, x;
    scanf("%d %d", &n ,&m);
    for (int i = 1; i <= n; ++i){
        scanf("%d", &x);
        add(i, x);
    }
    while (m--){
        int p, l, r;
        scanf("%d %d %d", &p, &
 
l, &r);
        if (p == 1) add(l, r);
        else printf("%lld\n", query(r) - query(l - 1));
    }
    return 0;
}