Submission #1151027

#	Time	Username	Problem	Language	Result	Execution time	Memory
1151027		thiendeptrai	Stove (JOI18_stove)	C++20	0 / 100	0 ms	320 KiB

stove

#include <bits/stdc++.h>
#define task "stove"
#define int long long
#define ii std::pair<int, int>
#define iii std::pair<ii, int>
#define fi first
#define se second
#define pb push_back
#define ins insert

const int maxn = 1e5;

int n, k;
int a[maxn + 7], f[maxn + 7];

signed main()
{
    std::ios_base::sync_with_stdio(0);
    std::cin.tie(0); std::cout.tie(0);

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

    std::cin >> n >> k;
    for (int i = 1; i <= n; i++)
    {
        std::cin >> a[i];
    }

    for (int i = 1; i < n; i++)
    {
        f[i] = a[i + 1] - a[i] + 1;
    }

    std::sort(f + 1, f + n, std::greater<int>());

    int sum = 0;
    for (int i = 1; i < k; i++)
    {
        sum += f[i];
    }

    std::cout << sum;

    return 0;
}

Compilation message (stderr)

stove.cpp: In function 'int main()':
stove.cpp:23:21: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |         std::freopen(task".inp", "r", stdin);
      |         ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
stove.cpp:24:21: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |         std::freopen(task".out", "w", stdout);
      |         ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 20
• Subtask 2: 0 / 30
• Subtask 3: 0 / 50