제출 #441369

#제출 시각아이디문제언어결과실행 시간메모리
441369kymGrowing Vegetables is Fun 4 (JOI21_ho_t1)C++14
100 / 100
36 ms5808 KiB
#include <bits/stdc++.h> using namespace std; #define int ll #define FOR(i,s,e) for(ll i = s; i <= (ll)e; ++i) #define DEC(i,s,e) for(ll i = s; i >= (ll)e; --i) #define IAMSPEED ios_base::sync_with_stdio(false); cin.tie(0); #ifdef LOCAL #define db(x) cerr << #x << "=" << x << "\n" #define db2(x, y) cerr << #x << "=" << x << " , " << #y << "=" << y << "\n" #define db3(a,b,c) cerr<<#a<<"="<<a<<","<<#b<<"="<<b<<","<<#c<<"="<<c<<"\n" #define dbv(v) cerr << #v << ":"; for (auto ite : v) cerr << ite << ' '; cerr <<"\n" #define dbvp(v) cerr << #v << ":"; for (auto ite : v) cerr << "{" << ite.f << ',' << ite.s << "} "; cerr << "\n" #define dba(a,ss,ee) cerr << #a << ":"; FOR(ite,ss,ee) cerr << a[ite] << ' '; cerr << "\n" #define reach cerr << "LINE: " << __LINE__ << "\n"; #else #define db(x) #define db2(x,y) #define db3(a,b,c) #define dbv(v) #define dbvp(v) #define dba(a,ss,ee) #define reach #endif mt19937 rng(chrono::steady_clock::now().time_since_epoch().count()); #define ll long long #define pb push_back #define eb emplace_back #define all(x) (x).begin(), (x).end() #define f first #define s second #define g0(x) get<0>(x) #define g1(x) get<1>(x) #define g2(x) get<2>(x) #define g3(x) get<3>(x) typedef pair <ll, ll> pi; typedef tuple<ll,ll,ll> ti3; typedef tuple<ll,ll,ll,ll> ti4; ll rand(ll a, ll b) { return a + rng() % (b-a+1); } const int MOD = 1e9 + 7; const int inf = (int)1e9 + 500; const long long oo = (ll)1e18 + 500; template <typename T> bool chmax(T& a, const T b) { return a<b ? a = b, 1 : 0; } template <typename T> bool chmin(T& a, const T b) { return a>b ? a = b, 1 : 0; } const int MAXN = 200005; int dp1[MAXN], dp2[MAXN], A[MAXN]; int32_t main() { IAMSPEED int n; cin >> n; FOR(i,1,n) cin >> A[i]; FOR(i,2,n) { if(A[i]>A[i-1])dp1[i]=dp1[i-1]; else dp1[i]=dp1[i-1]+(A[i-1]-A[i])+1; } DEC(i,n-1,1) { if(A[i]>A[i+1])dp2[i]=dp2[i+1]; else dp2[i]=dp2[i+1]+(A[i+1]-A[i])+1; } int ans = oo; FOR(i,1,n) { chmin(ans, max(dp1[i],dp2[i])); } cout << ans; }
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