Submission #916978

#	Time	Username	Problem	Language	Result	Execution time	Memory
916978		Akshat369	Stove (JOI18_stove)	C++17	0 / 100	63 ms	102564 KiB

stove

#include <bits/stdc++.h>

using namespace std;
#define int long long
#define INF (int)1e18
#define endl '\n'
const int mod = 1000 * 1000 * 1000 + 7;
const int N = 100005;
#define f first
#define s second
#define rep(i, a, b) for(int i = (a); i < (b); i++)
#define rrep(i, a, b) for(int i = (a); i > (b); i--)
#define vi vector<int>
#define pii pair<int, int>

mt19937_64 RNG(chrono::steady_clock::now().time_since_epoch().count());

void Solve() {
    int n , k; cin>>n>>k;
    vi a(n);
    for (int i = 0; i < n; ++i) {
        cin>>a[i];
    }
    vector<int> diff;
    for (int i = 0; i < n - 1; ++i) {
        diff.push_back(a[i+1]-a[i]-1);
    }
    int ans = n;
    for (int i = 0; i < n - k; ++i) {
        ans += diff[i];
    }
    
    cout<< ans << endl;
}

int32_t main() {
    auto begin = std::chrono::high_resolution_clock::now();
    ios_base::sync_with_stdio(false);
    cin.tie(0);

#ifndef ONLINE_JUDGE
    freopen("in.txt", "r", stdin);
    freopen("out.txt", "w", stdout);
#endif

    int t = 1;
 //   cin >> t;
    for (int i = 1; i <= t; i++) {
        //cout << "Case #" << i << ": ";
        Solve();
    }
    auto end = std::chrono::high_resolution_clock::now();
    auto elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(end - begin);
    cerr << "Time measured: " << elapsed.count() * 1e-9 << " seconds.\n";
    return 0;
}

Compilation message (stderr)

stove.cpp: In function 'int32_t main()':
stove.cpp:42:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   42 |     freopen("in.txt", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
stove.cpp:43:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   43 |     freopen("out.txt", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

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