Cod sursa(job #2423897)

Utilizator Anastasia11Susciuc Anastasia Anastasia11 Data 22 mai 2019 09:22:42
Problema Datorii Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.85 kb
#include <iostream>
#include <fstream>
#define lsb(x) ((x^(x-1))&x)
#define Nmax 15005

using namespace std;

ifstream f("datorii.in");
ofstream g("datorii.out");

int n, m;
int aib[Nmax];

void update(int poz, int val, int semn)
{
    val*=semn;
    for (; poz <= n; poz+=lsb(poz)) aib[poz]+=val;
}

void read()
{
    f >> n >> m;
    for (int i = 1, x; i <= n; i++)
    {
        f >> x;
        update(i, x, 1);
    }
}

int query(int poz)
{
    int s=0;
    for (; poz > 0; poz-=lsb(poz)) s+=aib[poz];
    return s;
}

void solve()
{
    int c, x, y;
    while (m--)
    {
        f >> c >> x >> y;
        if (c == 0)
        {
            update(x, y, -1);
        }
        else
        {
            g << query(y)-query(x-1) << '\n';
        }
    }
}

int main()
{
    read();
    solve();
    return 0;
}