70 lines
1.3 KiB
C++
70 lines
1.3 KiB
C++
#include<bits/stdc++.h>
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using namespace std;
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#define int long long
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int lowbit(int x);
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void update(int i,int n,int num,vector<int> &a);
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int query(int i,vector<int> &a);
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int rangeQuery(int l,int r,vector<int> &a);
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int readint();
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signed main(){
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int n=readint(),m=readint();
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vector<int> a(n+1,0);
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for(int i=1;i<=n;i++){
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int num;
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cin>>num;
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update(i, n, num, a);
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}
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for(int i=1;i<=m;i++){
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const int o = readint();
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if(o==1){
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const int x=readint(),k=readint();
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update(x, n, k, a);
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}else{
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const int x=readint(),y=readint();
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cout<<rangeQuery(x, y, a)<<endl;
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}
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}
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}
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int readint(){
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int x=0,w=1;
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char ch=0;
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while(!isdigit(ch)){
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if(ch=='-')w=-1;
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ch=getchar();
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}
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while(isdigit(ch)){
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x=x*10+(ch-'0');
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ch=getchar();
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}
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return x*w;
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}
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int rangeQuery(int l,int r,vector<int> &a){
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return query(r, a) - query(l-1, a);
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}
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int query(int i,vector<int> &a){
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int sum=0;
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while(i>0){
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sum+=a[i];
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i-=lowbit(i);
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}
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return sum;
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}
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void update(int i,int n,int num,vector<int> &a){
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while(i<=n){
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a[i]+=num;
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i+=lowbit(i);
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}
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}
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int lowbit(int x){
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return x&(-x);
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} |