verify/yosupo/data-structure/point_add_range_sum.test.cpp

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Last update: 2024-10-31 23:18:18+07:00
Problem: https://judge.yosupo.jp/problem/point_add_range_sum

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Code

#define PROBLEM "https://judge.yosupo.jp/problem/point_add_range_sum"
#include "template.hpp"
#include "data-structure/fenwick-tree.hpp"

int main(){
    cin.tie(nullptr)->sync_with_stdio(false);
    int n,q;
    cin >> n >> q;
    vector<int> a(n);
    for(auto &x:a)cin >> x;
    Fenwick<ll> f(a);
    while(q--){
        int op;
        cin >> op;
        if(op){
            int l,r;
            cin >> l >> r;
            cout << f.query(l,r-1) << "\n";
        }else{
            int p,x;
            cin >> p >> x;
            f.update(p,x);
        }
    }
}

#line 1 "verify/yosupo/data-structure/point_add_range_sum.test.cpp"
#define PROBLEM "https://judge.yosupo.jp/problem/point_add_range_sum"
#line 1 "template.hpp"
#include<bits/stdc++.h>
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

using ll = long long;
using db = long double;
using vi = vector<int>;
using vl = vector<ll>;
using vd = vector<db>;
using pii = pair<int,int>;
using pll = pair<ll,ll>;
using pdd = pair<db,db>;
const int INF=INT_MAX/2;
const int MOD=998244353;
const int MOD2=1000000007;
const ll LINF=LLONG_MAX/2;
const db DINF=numeric_limits<db>::infinity();
const db EPS=1e-9;
const db PI=acos(db(-1));

template<class T>
using ordered_set = tree<T,null_type,less<T>,rb_tree_tag,tree_order_statistics_node_update>;
template<class T>
using ordered_multiset = tree<T,null_type,less_equal<T>,rb_tree_tag,tree_order_statistics_node_update>;

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
mt19937_64 rng64(chrono::steady_clock::now().time_since_epoch().count());
#line 2 "data-structure/fenwick-tree.hpp"

/**
 * Author: Teetat T.
 * Date: 2024-01-15
 * Description: Fenwick / Binary Indexed Tree
 */

template<class T>
struct Fenwick{
    int n,logn;
    vector<T> t;
    Fenwick(){}
    Fenwick(int _n){init(vector<T>(_n,T{}));}
    template<class U>
    Fenwick(const vector<U> &a){init(a);}
    template<class U>
    void init(const vector<U> &a){
        n=(int)a.size();
        logn=31-__builtin_clz(n);
        t.assign(n+1,T{});
        for(int i=1;i<=n;i++){
            t[i]=t[i]+a[i-1];
            int j=i+(i&-i);
            if(j<=n)t[j]=t[j]+t[i];
        }
    }
    void update(int x,const T &v){
        for(int i=x+1;i<=n;i+=i&-i)t[i]=t[i]+v;
    }
    void update(int l,int r,const T &v){
        update(l,v),update(r+1,-v);
    }
    T query(int x){
        T res{};
        for(int i=x+1;i>0;i-=i&-i)res=res+t[i];
        return res;
    }
    T query(int l,int r){
        return query(r)-query(l-1);
    }
    int find(const T &k){
        int x=0;
        T cur{};
        for(int i=1<<logn;i>0;i>>=1)
            if(x+i<=n&&cur+t[x+i]<=k)x+=i,cur=cur+t[x];
        return x;
    }
};

#line 4 "verify/yosupo/data-structure/point_add_range_sum.test.cpp"

int main(){
    cin.tie(nullptr)->sync_with_stdio(false);
    int n,q;
    cin >> n >> q;
    vector<int> a(n);
    for(auto &x:a)cin >> x;
    Fenwick<ll> f(a);
    while(q--){
        int op;
        cin >> op;
        if(op){
            int l,r;
            cin >> l >> r;
            cout << f.query(l,r-1) << "\n";
        }else{
            int p,x;
            cin >> p >> x;
            f.update(p,x);
        }
    }
}