Cod sursa(job #3340192)

Utilizator abetAlbert Voiculescu abet Data 12 februarie 2026 16:35:07
Problema Datorii Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.65 kb
#include <bits/stdc++.h>

using namespace std;
ifstream in("datorii.in");
ofstream out("datorii.out");
int v[15005], aib[15005], n;
void update(int pos, int val){
    for(int i=pos;i<=n;i+=(i&-i))
        aib[i]+=val;
}
int query(int pos){
    int sum=0;
    for(int i=pos;i;i-=(i&-i))
        sum+=aib[i];
    return sum;
}
int main()
{
    int q, a, b, t;
    in>>n>>q;
    for(int i=1;i<=n;i++){
        in>>v[i];
        update(i, v[i]);
    }
    while(q--){
        in>>t>>a>>b;
        if(t==0){
            update(a, -b);
        }
        else{
            out<<query(b) - query(a-1)<<" ";
        }
    }
    return 0;
}