Submission #83649

#	Time	Username	Problem	Language	Result	Execution time	Memory
83649		nikolapesic2802	Untitled (POI11_tem)	C++98	48 / 100	735 ms	33792 KiB

Main

#include <bits/stdc++.h>

using namespace std;

#define ll long long
#define pb push_back
int ma;
const int N=2*1e6;
int m[N];
struct SegmentTree{
    int n;
    void init(int nn)
    {
        n=nn;
        for(int i=0;i<N;i++)
            m[i]=INT_MIN;
    }
    void set(int i,int k)
    {
        i+=n;
        m[i]=k;
        i>>=1;
        for(;i;i>>=1)
            m[i]=max(m[2*i],m[2*i+1]);
    }
    int get(int l,int r)
    {
        ma=INT_MIN;
        for(l+=n,r+=n;l<=r;l>>=1,r>>=1)
        {
            if(l%2==1)
            {
                ma=max(ma,m[l]);
                l++;
            }
            if(r%2==0)
            {
                ma=max(ma,m[r]);
                r--;
            }
        }
        return ma;
    }
};


int main()
{
    SegmentTree m;
    int n;
    scanf("%i",&n);
    m.init(n);
    int l=0;
    int maxx=INT_MIN;
    int res=0;
    int hi,lo,r,mid,d;
    for(int i=0;i<n;i++)
    {
        scanf("%i %i",&lo,&hi);
        m.set(i,lo);
        if(hi<maxx)
        {
            l++;
            r=i;
            while(l<r)
            {
                mid=(l+r)/2;
                d=m.get(mid,i);
                //printf("%i-%i   [%i][%i]=%i\n",l,r,mid,i,d);
                if(hi<d)
                {
                    l=mid+1;
                }
                else
                {
                    r=mid;
                }
            }
            maxx=m.get(l,i);
        }
        maxx=max(maxx,lo);
        res=max(res,i-l+1);
        //printf("%i-%i %i  %i\n",l,i,maxx,res);
    }
    printf("%i\n",res);
    return 0;
}

Compilation message (stderr)

tem.cpp: In function 'int main()':
tem.cpp:51:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%i",&n);
     ~~~~~^~~~~~~~~
tem.cpp:59:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%i %i",&lo,&hi);
         ~~~~~^~~~~~~~~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 8 / 8
• Subtask 3: 8 / 8
• Subtask 4: 8 / 8
• Subtask 5: 8 / 8
• Subtask 6: 8 / 8
• Subtask 7: 0 / 8
• Subtask 8: 0 / 8
• Subtask 9: 0 / 9
• Subtask 10: 0 / 9
• Subtask 11: 0 / 9
• Subtask 12: 0 / 9