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Cod sursa(job #50332)
#include <cstdio>
#define maxn 64000
#define bit(x) ( (x) &(((x)-1)^(x)))
int S[maxn];
int n, m, i, p, q,t;
void update(int x, int val, int sgn)
{
for(;x<=n;x+=bit(x)) S[x]+=val*sgn;
}
int query(int x)
{
int sum=0;
for(;x>0;x-=bit(x)) sum+=S[x];
return sum;
}
int main()
{
freopen("datorii.in", "r", stdin);
freopen("datorii.out", "w", stdout);
scanf("%d %d\n", &n, &m);
for(i=1;i<=n;i++)
{
scanf("%d ", &p);
update(i, p,1);
}
for(i=1;i<=m;i++)
{
scanf("%d %d %d\n", &t, &p, &q);
if(t==0) update(p, q, -1);
else printf("%d\n", query(q)-query(p-1));
}
return 0;
}