Cod sursa(job #1892511)

Utilizator gabrielamoldovanMoldovan Gabriela gabrielamoldovan Data 25 februarie 2017 00:37:52
Problema Subsecventa de suma maxima Scor 25
Compilator cpp Status done
Runda Arhiva educationala Marime 0.91 kb
#include <iostream>
#include <fstream>

#define nmax 6000005
#define zeros(x) ((x^(x-1))&x)

using namespace std;

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

int aib[nmax];
int n, val, pos, a, b, m;

void Add(int x, int quantity)
{
    for(int i=x; i<=n; i+=zeros(i))
    {
        aib[i]+=quantity;
    }
}

int Compute(int x)
{
    int suma=0;
    for(int i=x; i>=1; i-=zeros(i))
    {
        suma+=aib[i];
    }
    return suma;
}

int main()
{
    f>>n;
    int x;
    for(int i=1; i<=n; ++i)
    {
        f>>x;
        Add(i,x);

    }
    m=Compute(n);
    a=1;
    b=n;
    for(int i=1; i<n; ++i)
    {
        for(int j=i+1; j<=n; ++j)
        {
            x=Compute(j)-Compute(i-1);
            if(m<x)
            {
                m=x;
                a=i;
                b=j;
            }
        }
    }
    g<<m<<" "<<a<<" "<<b;
    return 0;
}