Submission #12140

#	Time	Username	Problem	Language	Result	Execution time	Memory
12140		dohyun0324	trapezoid (balkan11_trapezoid)	C++98	16 / 100	146 ms	8152 KiB

trapezoid

#include<stdio.h>
#include<algorithm>
using namespace std;
int dap,sum,t=1,w,n,tree[300010],cnt[300010],d[200010],d2[200010];
struct data
{
    int x1,y1,x2,y2;
    bool operator<(const data&r)const{
        return y1<r.y1;
    }
}a[100010];
struct data2
{
    int x,p;
    bool operator<(const data2&r)const{
        return x<r.x;
    }
}arr[200010];
void ins(int x,int gap,int i)
{
    int p=x+t-1;
    while(p>0)
    {
        if(tree[p]==gap) cnt[p]+=d2[i];
        if(tree[p]<gap) cnt[p]=d2[i];
        tree[p]=max(tree[p],gap);
        p/=2;
    }
}
int query(int a,int b,int x,int y,int k)
{
    if(a<=x && y<=b) return tree[k];
    if(a>y || x>b) return 0;
    return max(query(a,b,x,(x+y)/2,k*2),query(a,b,(x+y)/2+1,y,k*2+1));
}
int query2(int a,int b,int x,int y,int k)
{
    int s1,s2;
    if(a<=x && y<=b) return cnt[k];
    if(a>y || x>b) return 0;
    s1=query(a,b,x,(x+y)/2,k*2); s2=query(a,b,(x+y)/2+1,y,k*2+1);
    if(s1==s2) return query2(a,b,x,(x+y)/2,k*2)+query2(a,b,(x+y)/2+1,y,k*2+1);
    else if(s1>s2) return query2(a,b,x,(x+y)/2,k*2);
    else return query2(a,b,(x+y)/2+1,y,k*2+1);
}
int main()
{
    int i,j,p=1;
    scanf("%d",&n);
    for(i=1;i<=n;i++)
    {
        scanf("%d %d %d %d",&a[i].x1,&a[i].y1,&a[i].x2,&a[i].y2);
        w++; arr[w].x=a[i].x2; arr[w].p=i*2; w++; arr[w].x=a[i].y2; arr[w].p=i*2+1;
    }
    sort(arr+1,arr+w+1);
    for(i=1;i<=w;i++)
    {
        if(arr[i].p%2==0) a[arr[i].p/2].x2=i;
        else a[arr[i].p/2].y2=i;
    }
    sort(a+1,a+n+1);
    for(i=1;;i++){if(t>=w) break; t*=2;}
    for(i=1;i<=n;i++)
    {
        for(j=p;j<=n;j++)
        {
            if(a[i].x1<a[j].y1) break;
            ins(a[j].y2,d[j],j);
        }
        p=j;
        d[i]=query(1,a[i].x2-1,1,t,1)+1;
        d2[i]=query2(1,a[i].x2-1,1,t,1);
        if(d[i]==1) d2[i]=1;
    }
    for(i=1;i<=n;i++)
    {
        if(dap==d[i]) sum+=d2[i];
        if(dap<d[i])
        {
            dap=d[i];
            sum=d2[i];
        }
    }
    printf("%d %d",dap,sum);
    return 0;
}

Compilation message (stderr)

trapezoid.cpp: In function 'int main()':
trapezoid.cpp:49:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
                   ^
trapezoid.cpp:52:65: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d %d %d",&a[i].x1,&a[i].y1,&a[i].x2,&a[i].y2);
                                                                 ^

• Subtask 1: 16 / 100