Cod sursa(job #3180924)

Utilizator paull122Paul Ion paull122 Data 6 decembrie 2023 10:06:06
Problema Datorii Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 1.47 kb
#include <bits/stdc++.h>
using namespace std;

typedef unsigned long long ll;
using namespace std;

ifstream fin("datorii.in");
ofstream fout("datorii.out");

int v[15001];
int A[80001];
int sum;
void build(int i,int st,int dr)
{
    if(st==dr)
    {
        A[i]=v[st];
    }
    else
    {
        int m = (st+dr)/2;
        build(2*i,st,m);
        build(2*i+1,m+1,dr);
        A[i]=A[2*i]+A[2*i+1];
    }
}
void query(int i,int st,int dr,int a,int b)
{
    if(a<=st && dr<=b)
    {
        sum += A[i];
    }
    else
    {
        int m = (st+dr)/2;
        if(a <= m)
        {
            query(2*i,st,m,a,b);
        }
        if(b>m)
        {
            query(2*i+1,m+1,dr,a,b);
        }
    }
}
void update(int i,int st,int dr,int a,int b)
{
    if(st==dr)
    {
        A[i]+=b;
    }
    else
    {
        int m=(st+dr)/2;
        if(a <= m)
        {
            update(2*i,st,m,a,b);
        }
        else
        {
            update(2*i+1,m+1,dr,a,b);
        }
        A[i]=A[2*i]+A[2*i+1];
    }
}
int main()
{
    int n,q;
    fin >> n >> q;
    for(int i=1;i<=n;i++)
    {
        fin >> v[i];
    }
    build(1,1,n);
    while(q--)
    {
        int t,a,b;
        fin >> t >> a >> b;
        if(t==0)
        {
            update(1,1,n,a,-1*b);
        }
        if(t==1)
        {
            sum=0;
            query(1,1,n,a,b);
            fout << sum << '\n';
        }
    }

}