Submission #949654

#	Time	Username	Problem	Language	Result	Execution time	Memory
949654		Hanksburger	Jousting tournament (IOI12_tournament)	C++17	100 / 100	99 ms	9076 KiB

tournament

#include <bits/stdc++.h>
using namespace std;
int bit[100005], bit2[100005], b[100005];
set<int> s;
void upd(int x, int y)
{
    for (int i=x; i<=100000; i+=i&(-i))
        bit[i]+=y;
}
void upd2(int x, int y)
{
    for (int i=x; i<=100000; i+=i&(-i))
        bit2[i]+=y;
}
int qry(int x)
{
    int res=0;
    for (int i=x; i; i-=i&(-i))
        res+=bit[i];
    return res;
}
int qry2(int x)
{
    int res=0;
    for (int i=x; i; i-=i&(-i))
        res+=bit2[i];
    return res;
}
void fix(int x, int y)
{
    upd(x, y-(qry(x)-qry(x-1)));
}
int f(int x)
{
    int l=0, r=99999;
    while (l<r)
    {
        int mid=(l+r)/2;
        if (qry(mid+1)<x)
            l=mid+1;
        else
            r=mid;
    }
    return l;
}
int GetBestPosition(int n, int m, int k, int *a, int *l, int *r)
{
    for (int i=0; i<n-1; i++)
        upd2(i+1, a[i]>k);
    for (int i=0; i<n; i++)
        upd(i+1, 2), s.insert(i);
    for (int i=0; i<m; i++)
    {
        int L=f(l[i]*2+1), R=f(r[i]*2+2);
        if (qry2(L)==qry2(R))
            b[L]++, b[R]--;
        fix(L+1, 1), fix(R+1, 1);
        vector<int> v;
        for (auto it=s.lower_bound(L+1); it!=s.end(); it++)
        {
            if (*it>=R)
                break;
            fix(*it+1, 0), v.push_back(*it);
        }
        for (int x:v)
            s.erase(s.find(x));
    }
    int ind=0, mx=b[0];
    for (int i=1; i<n; i++)
        if (mx<(b[i]+=b[i-1]))
            mx=b[i], ind=i;
    return ind;
}

• Subtask 1: 17 / 17
• Subtask 2: 32 / 32
• Subtask 3: 51 / 51