Submission #14236

#	Time	Username	Problem	Language	Result	Execution time	Memory
14236		dohyun0324	사회적 불평등 (TOKI14_social)	C++98	100 / 100	46 ms	14364 KiB

social

#include<stdio.h>
#include<algorithm>
using namespace std;
int n,t;
long long dap;
struct data{
    int x,y;
    bool operator<(const data&r)const{
        return x<r.x;
    }
}a[100010];
struct data2
{
    long long val1,val2,val3,val4;
}tree[400010];
void update(int pos,int p)
{
    int x=a[pos].y;
    while(x<=t)
    {
        tree[x].val1+=p*a[pos].x*a[pos].y;
        tree[x].val2+=p*a[pos].x;
        tree[x].val3+=p*a[pos].y;
        tree[x].val4+=p;
        x+=x&(-x);
    }
}
long long query(int x,int a,int b)
{
    long long s=0;
    while(x)
    {
        s+=tree[x].val1-b*tree[x].val2-a*tree[x].val3+a*b*tree[x].val4;
        x-=x&(-x);
    }
    return s;
}
int main()
{
    int i,maxi=0;
    scanf("%d",&n);
    for(i=1;i<=n;i++)
    {
        scanf("%d %d",&a[i].x,&a[i].y);
        if(maxi<a[i].y) maxi=a[i].y;
    }
    for(t=1;t<=maxi;t*=2);
    sort(a+1,a+n+1);
    for(i=1;i<=n;i++)
    {
        update(i,1);
    }
    for(i=1;i<=n;i++)
    {
        update(i,-1);
        dap+=query(a[i].y,a[i].x,a[i].y);
        dap+=-(query(t,a[i].x,a[i].y)-query(a[i].y,a[i].x,a[i].y));
    }
    printf("%lld",-dap);
    return 0;
}

• Subtask 1: 29 / 29
• Subtask 2: 19 / 19
• Subtask 3: 20 / 20
• Subtask 4: 32 / 32