Cod sursa(job #1207595)
Utilizator | Mihai Musat mihaimusat | Data | 13 iulie 2014 14:26:49 |
---|---|---|---|
Problema | Datorii | Scor | 100 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.59 kb |
#include <fstream>
#define ub(x) (x&(-x))
using namespace std;
int key,x,y,AIB[20001],i,n,m;
void add(int poz,int x)
{
int i;
for(i=poz;i<=n;i+=ub(i))
AIB[i]+=x;
}
int sum(int poz)
{
int i,s=0;
for(i=poz;i>0;i-=ub(i))
s+=AIB[i];
return s;
}
int main()
{
ifstream f("datorii.in");
ofstream g("datorii.out");
f>>n>>m;
for (i=1;i<=n;i++) f>>x,add(i,x);
for (i=1;i<=m;i++)
{
f>>key>>x>>y;
if (key==0)
add(x,-y);
if (key==1)
g<<sum(y)-sum(x-1)<<'\n';
}
return 0;
}