제출 #941787

#제출 시각아이디문제언어결과실행 시간메모리
941787LitusianoGrowing Vegetables is Fun 4 (JOI21_ho_t1)C++17
100 / 100
67 ms13012 KiB
#include<bits/stdc++.h> using namespace std; #define int long long const int inf = 1e18; signed main(){ int n; cin>>n; vector<int> v(n); for(int& i : v) cin>>i; // for(int i : v) cout<<i<<" "; cout<<endl; vector<int> dp(n,inf), dp1(n,inf), mx(n+1,0), mx1(n+1,0); dp[0] = 0; mx[0] = 0; vector<int> last(n+1,0), last1(n+1,0); // just add max(between act and last) for(int i = 1; i<n; i++){ // cerr<<i<<" "<<v[i-1]<<" "<<dp[i-1]<<" "<<mx[i-1]<<endl; if(v[i] > v[i-1]){ dp[i] = dp[i-1]; continue; } dp[i] = dp[i-1] + max(0ll, abs(v[i] - v[i-1])) + 1; } dp1[n-1] = 0; mx1[n] = 0; for(int i = n-2; i>=0; i--){ // cerr<<"dp1 "<<i<<" "<<v[i]<<" "<<dp1[i+1]<<" "<<mx1[i+1]<<" "; if(v[i] > v[i+1]){ dp1[i] = dp1[i+1]; continue; } dp1[i] = dp1[i+1] + max(0ll,(v[i+1]- v[i])) + 1; } // mx1[n] = v[n-1]; mx[0] = v[0]; // for(int i : mx1) cout<<i<<" "; cout<<endl; int ans = min(dp[n-1],dp1[0]); // cerr<<dp[n]<<" "<<dp1[0]<<endl; for(int i = 1; i<n; i++){ // cerr<<dp[i]<<" "<<dp1[i]<<endl; ans = min(ans, max(dp[i], dp1[i])); } cout<<ans<<endl; }
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