Submission #602819

#TimeUsernameProblemLanguageResultExecution timeMemory
602819IvanJGrowing Vegetables is Fun 4 (JOI21_ho_t1)C++17
100 / 100
38 ms9264 KiB
#include<bits/stdc++.h> using namespace std; typedef long long ll; const int maxn = 2e5 + 5; int n; int A[maxn]; int B[maxn]; int C[maxn]; int M1[maxn], M2[maxn]; ll pref[maxn]; ll suff[maxn]; int main() { scanf("%d", &n); for(int i = 0;i < n;i++) scanf("%d", A + i); B[0] = 0; int maxi = A[0] + 1; for(int i = 1;i < n;i++) B[i] = max(maxi - A[i], 0), maxi = max(maxi, A[i]) + 1, M1[i] = maxi; for(int i = 1;i < n;i++) pref[i] = pref[i - 1] + (ll)max(B[i] - B[i - 1], 0); C[n - 1] = 0; maxi = A[n - 1] + 1; for(int i = n - 2;i >= 0;i--) C[i] = max(maxi - A[i], 0), maxi = max(maxi, A[i]) + 1, M2[i] = maxi; for(int i = n - 2;i >= 0;i--) suff[i] = suff[i + 1] + (ll)max(C[i] - C[i + 1], 0); ll ans = min(pref[n - 1], suff[0]); for(int i = 0;i < n - 1;i++) ans = min(ans, max(pref[i], suff[i + 1]) + (M1[i] == M2[i + 1])); printf("%lld\n", ans); return 0; }

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:18:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |  scanf("%d", &n);
      |  ~~~~~^~~~~~~~~~
Main.cpp:20:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |   scanf("%d", A + i);
      |   ~~~~~^~~~~~~~~~~~~
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