Submission #1169716

#	Time	Username	Problem	Language	Result	Execution time	Memory
1169716		thelegendary08	송신탑 (IOI22_towers)	C++17	0 / 100	4085 ms	2162688 KiB

towers

#include "towers.h"
#include<bits/stdc++.h>
#define vi vector<int>
#define pb push_back
#define f0r(i,n) for(int i = 0; i<n; i++)
#define FOR(i, k, n) for(int i = k; i<n; i++)
using namespace std;

int mxd = -1;
int mx = 0;
vi v;
const int mxn = 1e5 + 5;
vi tree(mxn * 4);
int n;
void update(int k, int x){
	k += n;
	tree[k] = x;
	for(k /=2; k>=1; k/=2){
		tree[k] = max(tree[k*2], tree[k*2+1]);
	}
}
int quer(int l, int r){
	if(l >r)return 0;
	l += n; r += n;
	int ret = 0;
	while(l <= r){
		if(l % 2 == 1)ret = max(ret, tree[l++]);
		if(r % 2 == 0)ret = max(ret, tree[r--]);
		r /=2; l /=2;
	}
	return ret;
}
void init(int N, std::vector<int> v) {
	n = N;
	::v = v;
	f0r(i, N){
		if(v[i] > mx){
			mx = v[i];
			mxd = i;
		}
	}
	f0r(i, N){
		update(i, v[i]);
	}
}

int max_towers(int l, int r, int d) {
  	vi v;
  	FOR(i, l, r+1){
  		v.pb(::v[i]);
  	}
  	int n = r - l + 1;
  	vector<vi> dp(n, vi(n+1));
  	dp[0][0] = 1;
  	vi mx(n);
  	mx[0] = 1;
  	FOR(i, 1, n){
  		dp[i][0] = 1;
  		FOR(j, 1, i+1){
  			int maxx = quer(j, i - 1) - d;
  			if(v[j-1] <= maxx && v[i] <= maxx)dp[i][j] = mx[j-1] + 1;
  		}
  		f0r(j, n+1)mx[i] = max(mx[i], dp[i][j]);
  	}
  	int ans = 0;
  	f0r(i,n)f0r(j, n+1)ans = max(ans, dp[i][j]);
  	return ans;
}

• Subtask 1: 0 / 4
• Subtask 2: 0 / 11
• Subtask 3: 0 / 12
• Subtask 4: 0 / 14
• Subtask 5: 0 / 17
• Subtask 6: 0 / 19
• Subtask 7: 0 / 23