Cod sursa(job #1365477)
Utilizator | Data | 28 februarie 2015 12:08:48 | |
---|---|---|---|
Problema | Datorii | Scor | 100 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 1.71 kb |
#include <cstdio>
#include <algorithm>
using namespace std;
int a[500001], Max, n;
void update (int poz, int val, int nod, int st, int dr)
{
int m=(st+dr)/2;
if (st==dr)
{
a[nod]+=val;
return;
}
if (m<poz)
{
update(poz,val,nod*2+1,m+1,dr);
}
else if (m>=poz)
{
update(poz,val,nod*2,st,m);
}
a[nod]=a[nod*2]+a[nod*2+1];
}
void query(int x, int y, int nod, int st, int dr)
{
int m=(st+dr)/2;
if (st>=x && dr<=y)
{
Max+=a[nod];
return;
}
if (m>=x)
{
query(x,y,nod*2,st,m);
}
if (m<y)
{
query(x,y,nod*2+1,m+1,dr);
}
}
int main()
{
int m, i, p, x, y;
freopen("datorii.in","r",stdin);
freopen("datorii.out","w",stdout);
scanf("%d%d",&n,&m);
for (i=1; i<=n; i++)
{
scanf("%d",&x);
update(i,x,1,1,n);
}
for (i=1; i<=m; i++)
{
scanf("%d%d%d",&p,&x,&y);
if (p==0)
{
update(x,y*(-1),1,1,n);
}
else
{
Max=0;
query(x,y,1,1,n);
printf("%d\n",Max);
}
}
return 0;
}