Cod sursa(job #1245193)

Utilizator adnionutCojocaru Ionut adnionut Data 18 octombrie 2014 18:56:32
Problema Datorii Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.67 kb
#include <cstdio>
#define maxn 1<<20
#define bit(i)  (((i) & ((i)-1))  ^ (i))
int s[maxn];
int n;
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()
{
    int  m;
    freopen("datorii.in", "r", stdin);
    freopen("datorii.out", "w", stdout);
    scanf("%d %d\n", &n, &m);
    int i,p;
    for(i=1;i<=n;i++) { scanf("%d ", &p); update(i, p, 1);}
 
    for(i=1;i<=m;i++)
{
    int a, b, c;
    scanf("%d %d %d\n", &a, &b, &c);
    if(a==1) printf("%d\n", query(c)-query(b-1));
        else update(b, c, -1);
}
return 0;
}