제출 #1322777

#제출 시각아이디문제언어결과실행 시간메모리
1322777adiyerXylophone (JOI18_xylophone)C++20
47 / 100
35 ms20548 KiB
#include "xylophone.h" #include <bits/stdc++.h> using namespace std; static int a[5005]; int dp[5005][5005]; int ask(int l, int r){ if(dp[l][r]) return dp[l][r]; return dp[l][r] = query(l, r); } void solve(int n){ int l = 1, r = n; while(r - l > 1){ int md = ((l + r) >> 1); if(ask(1, md) == n - 1) r = md; else l = md; } a[r] = n; a[l] = n - ask(l, r); if(r < n) a[r + 1] = n - ask(r, r + 1); for(int i = l - 1; i >= 1; i--){ a[i] = a[i + 1] - ask(i, i + 1); if(ask(i, i + 1) == abs(a[i + 1] - a[i]) && ask(i, i + 2) == max({a[i], a[i + 1], a[i + 2]}) - min({a[i], a[i + 1], a[i + 2]}) && ask(i + 1, i + 2) == abs(a[i + 2] - a[i + 1])) continue; a[i] = a[i + 1] + ask(i, i + 1); } for(int i = r + 1; i <= n; i++){ a[i] = a[i - 1] - ask(i - 1, i); if(ask(i - 1, i) == abs(a[i] - a[i - 1]) && ask(i - 2, i) == max({a[i], a[i - 1], a[i - 2]}) - min({a[i], a[i - 1], a[i - 2]}) && ask(i - 2, i - 1) == abs(a[i - 2] - a[i - 1])) continue; a[i] = a[i - 1] + ask(i - 1, i); } for(int i = 1; i <= n; i++){ answer(i, a[i]); } }
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