Submission #1055256

#	Time	Username	Problem	Language	Result	Execution time	Memory
1055256		manhlinh1501	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	19 ms	5108 KiB

Main

#include <bits/stdc++.h>
using namespace std;
using i64 = long long;
const i64 oo64 = 1e18;
using pll = pair<i64, i64>;
const int MAXN = 2e5 + 5;

int N;
i64 a[MAXN];
i64 prefix[MAXN];
i64 suffix[MAXN];

signed main() {
#define TASK "code"

    if (fopen(TASK ".inp", "r")) {
        freopen(TASK ".inp", "r", stdin);
        freopen(TASK ".out", "w", stdout);
    }

    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    cin >> N;
    for(int i = 1; i <= N; i++) cin >> a[i];
    for(int i = 1; i <= N; i++) prefix[i] = prefix[i - 1] + max(0LL, (a[i - 1] + 1) - a[i]);
    for(int i = N; i >= 1; i--) suffix[i] = suffix[i + 1] + max(0LL, (a[i + 1] + 1) - a[i]);
    i64 ans = oo64;
    for(int i = 1; i <= N; i++) ans = min(ans, max(prefix[i], suffix[i]));
    cout << ans;
    return (0 ^ 0);
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:17:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |         freopen(TASK ".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:18:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |         freopen(TASK ".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

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