Cod sursa(job #1973649)

Utilizator Horea_Mihai_SilaghiHorea Mihai Silaghi Horea_Mihai_Silaghi Data 25 aprilie 2017 17:14:27
Problema Datorii Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.84 kb
#include <iostream>
#include <fstream>
#define DM 15005
using namespace std;
ifstream fin("datorii.in");
ofstream fout("datorii.out");
int aib[DM], n, m, x, a, b;

void update(int poz, int val)
{
    for(; poz <= n; poz += (poz & (-poz)))
        aib[poz] += val;
}
int sum(int poz)
{
    int rez = 0;
    for(; poz > 0; poz -= (poz & (-poz)))
        rez += aib[poz];
    return rez;
}
int query(int a, int b)
{
    return sum(b) - sum(a - 1);
}

int main()
{
    fin >> n >> m;
    for(int i = 1; i <= n; i++)
    {
        fin >> x;
        update(i, x);
    }
    for(int i = 1; i<=n;i++)
        cout<<aib[i]<<' ';
    for(int i = 1; i <= m; i++)
    {
        fin >> x >> a >> b;
        if(x == 0)
            update(a, -b);
        if(x == 1)
            fout << query(a, b) << '\n';
    }

    return 0;
}