Submission #1166389

#	Time	Username	Problem	Language	Result	Execution time	Memory
1166389		CrabCNH	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++20	100 / 100	14 ms	6512 KiB

Main

#include <bits/stdc++.h>

#define task   "BriantheCrab"

#define int    long long
#define pii    pair <int, int>
#define fi     first
#define se     second
#define szf    sizeof
#define sz(s)  (int)((s).size())

using namespace std;

template <class T> void mini (T &t, T f) {if (t > f) t = f;}
template <class T> void maxi (T &t, T f) {if (t < f) t = f;}

const int maxN = 2e5 + 5;
const int inf = 1e18 + 7;
const int mod = 1e9 + 7;

int a[maxN], b[maxN];
int l[maxN], r[maxN];

void solve () {
    int n;
    cin >> n;
    for (int i = 1; i <= n; i ++) {
        cin >> a[i];
    }
    for (int i = 1; i < n; i ++) {
        b[i] = a[i + 1] - a[i];
    }
    for (int i = 1; i < n; i ++) {
        l[i] = max (1 - b[i], 0LL) + l[i - 1];
    }
    for (int i = n - 1; i >= 1; i --) {
        r[i] = max (1 + b[i], 0LL) + r[i + 1];
    }
    int res = inf;
    for (int i = 1; i <= n; i ++) {
        mini (res, max (l[i - 1], r[i]));
    }
    cout << res;
    
}

signed main () {
    cin.tie (nullptr) -> sync_with_stdio (false);
    if (fopen (task".inp", "r")) {
        freopen (task".inp", "r", stdin);
        freopen (task".out", "w", stdout);
    }
    int t = 1;
    //cin >> t;
    while (t --) {
        solve ();
    } 
    return 0;
}
// thfdgb

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:50:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   50 |         freopen (task".inp", "r", stdin);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:51:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   51 |         freopen (task".out", "w", stdout);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 40 / 40
• Subtask 2: 60 / 60