Submission #13237

#	Time	Username	Problem	Language	Result	Execution time	Memory
13237		dohyun0324	Weighting stones (IZhO11_stones)	C++98	100 / 100	70 ms	8112 KiB

stones

#include<stdio.h>
#include<algorithm>
using namespace std;
static int n,x1,y1,t=1,p;
struct data
{
  int maxi,mini,ch;
}Tree[600010];
void update(int x,int y,int k,int s,int e)
{
    if(Tree[k].ch!=0)
    {
        Tree[k].maxi+=Tree[k].ch; Tree[k].mini+=Tree[k].ch;
        Tree[k*2].ch+=Tree[k].ch; Tree[k*2+1].ch+=Tree[k].ch; Tree[k].ch=0;
    }
    if(s<=x && y<=e)
    {
        Tree[k].maxi+=p; Tree[k].mini+=p; Tree[k*2].ch+=p; Tree[k*2+1].ch+=p;
        return;
    }
    if(s>y || e<x) return;
    update(x,(x+y)/2,k*2,s,e);
    update((x+y)/2+1,y,k*2+1,s,e);
    Tree[k].maxi=max(Tree[k*2].maxi,Tree[k*2+1].maxi);
    Tree[k].mini=min(Tree[k*2].mini,Tree[k*2+1].mini);
}
int main()
{
    int i;
    scanf("%d",&n);
    for(;;){if(t>=n) break; t*=2;}
    for(i=1;i<=n;i++)
    {
        scanf("%d %d",&x1,&y1);
        if(y1==1) p=1;
        else p=-1;
        update(1,t,1,1,x1);
        if(Tree[1].maxi<=0) printf("<\n");
        else if(Tree[1].mini>=0) printf(">\n");
        else printf("?\n");
    }
    return 0;
}

• Subtask 1: 100 / 100