namespace bit{
const int N=500000;
int n,a[N+10];
void add(int x,int d){for(;x<=n;x+=x&-x)a[x]+=d;}
int sum(int x){int r=0;for(;x;x-=x&-x)r+=a[x];return r;}
}
6
19
2014
19
2014
namespace bit{
const int N=500000;
int n,a[N+10];
void add(int x,int d){for(;x<=n;x+=x&-x)a[x]+=d;}
int sum(int x){int r=0;for(;x;x-=x&-x)r+=a[x];return r;}
}
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