Submission #541507

#	Time	Username	Problem	Language	Result	Execution time	Memory
541507		AmirElarbi	Jousting tournament (IOI12_tournament)	C++14	49 / 100	1095 ms	7244 KiB

tournament

#include <bits/stdc++.h>
#define vi vector<int>
#define ve vector
#define ll long long
#define vf vector<float>
#define vll vector<pair<ll,ll>>
#define ii pair<int,int>
#define pll pair<ll,ll>
#define vvi vector<vi>
#define vii vector<ii>
#define gii greater<ii>
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define INF 2e9+5
#define eps 1e-7
#define eps1 1e-25
#define optimise ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
#define MAX_A 1e5+5
#define V 450
using namespace std;
const int MOD = 1e9;
const int nax = 1e5+5;
int st[nax][30];
int lg[nax+1];

int GetBestPosition(int n, int c, int r, int *k, int *s, int *e) {
	vi rngs(n);
	for (int i = 0; i < n; ++i)
		rngs[i] = i;
	for (int i = 0; i < c; ++i)
	{
		int lb = lower_bound(rngs.begin(), rngs.end(), s[i])-rngs.begin();
		int ub = upper_bound(rngs.begin(), rngs.end(), e[i])-rngs.begin()-1;
		for (int j = lb; j <= ub; ++j)
			rngs[j] = rngs[lb];
		for (int j = ub+1; j < n; ++j)
			rngs[j] -= (e[i]-s[i]);
		s[i] = lb,e[i] = ub;
	}
	int mx = 0, ps = 0;
	
	lg[1] = 0;
	for (int i = 2; i < nax; i++)
	    lg[i] = lg[i/2] + 1;
	for (int i = 0; i < n-1; i++)
	    st[i][0] = k[i];

	for (int j = 1; j < 30; j++)
	    for (int i = 0; i + (1 << j) <= n; i++)
	        st[i][j] = max(st[i][j-1], st[i + (1 << (j - 1))][j - 1]);
	for (int i = 0; i < n; ++i)
	{
		int res = 0, ind = i;
		for (int j = 0; j < c; ++j)
		{	
			if(s[j] <= i && i <= e[j]){
				int clg = lg[e[j] - s[j] ];
				int cur = max(st[s[j]][clg], st[e[j] - (1 << clg)][clg]);
				if(cur < r)
					res++;
				else break;
			}
		}
		if(res > mx){
			mx = res;
			ps = i;
		}
	}
  	return ps;
}

Compilation message (stderr)

tournament.cpp: In function 'int GetBestPosition(int, int, int, int*, int*, int*)':
tournament.cpp:55:16: warning: unused variable 'ind' [-Wunused-variable]
   55 |   int res = 0, ind = i;
      |                ^~~

• Subtask 1: 17 / 17
• Subtask 2: 32 / 32
• Subtask 3: 0 / 51