Submission #217623

#	Time	Username	Problem	Language	Result	Execution time	Memory
217623		DodgeBallMan	Secret (JOI14_secret)	C++14	100 / 100	545 ms	8440 KiB

secret

#include<bits/stdc++.h>
#include "secret.h"
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
 
using namespace __gnu_pbds;
using namespace std;
template <typename T>
using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
 
const int N = 1e5 + 5, inf = 1e9;
#define pb push_back
#define mp make_pair
#define ll long long
#define ff first
#define ss second
#define all(a) a.begin(),a.end()
#define sz(x) (int)x.size()
typedef vector<int> vi;
typedef pair<int,int> ii;
typedef vector<ii> vii;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
 
int ans[1005][1005];
 
void solve(int l, int r, int a[]){
	if(l == r){
		return;
	}
	int mid = (l + r) / 2;
	for(int i = mid - 1; i >= l; i--){
		ans[i][mid] = Secret(a[i], ans[i + 1][mid]);
	}
	for(int i = mid + 2; i <= r; i++){
		ans[mid + 1][i] = Secret(ans[mid + 1][i - 1], a[i]);
	}
	solve(l, mid, a);
	solve(mid + 1, r, a);
}
void Init(int n, int a[]){
	memset(ans, -1, sizeof ans);
	for(int i = 0; i < n; i++)ans[i][i] = a[i];
	solve(0, n - 1, a);
}
int Query(int ql, int qr){
	if(ans[ql][qr] != -1)return ans[ql][qr];
	for(int i = ql; i < qr; i++){
		if(ans[ql][i] != -1 && ans[i + 1][qr] != -1){
			return Secret(ans[ql][i], ans[i + 1][qr]);
		}
	}
}

Compilation message (stderr)

secret.cpp: In function 'int Query(int, int)':
secret.cpp:52:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

• Subtask 1: 100 / 100