Submission #1228810

#	Time	Username	Problem	Language	Result	Execution time	Memory
1228810		khoingu	Stove (JOI18_stove)	C++20	0 / 100	0 ms	328 KiB

stove

#include <bits/stdc++.h>
#define ll long long
#define fi(i,a,b) for(int i = a; i <= b; i ++)
using namespace std;
const ll maxN = 1e5 + 5;

int n, k, t[maxN], ans = 0;
bool vis[maxN];
vector <int> tim;

signed main() {
    if (fopen("task.inp", "r")) {
        freopen("task.inp", "r", stdin);
        freopen("task.out", "w", stdout);
    }
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cin >> n >> k;
    for(int i = 1; i <= n; i ++) {
        cin >> t[i];
        vis[t[i] + 1] = true;
    }
    ans = t[n] + 1 - t[1];
    int cnt = 0;
    for(int i = 1; i <= t[n] + 1; i ++) {
        if (!vis[i])
            cnt ++;
        else {
            if (cnt != 0) {
                tim.push_back(cnt);
                cnt = 0;
            }
        }
    }
    sort(tim.rbegin(), tim.rend());
    //for(auto x : tim) cout << x << ' ';
    k --;
    while (k > 0 and !tim.empty()) {
        ans -= tim[0];
        //cout << tim[0] << " ";
        tim.erase(tim.begin());
        k --;
    }
    cout << ans;
}

Compilation message (stderr)

stove.cpp: In function 'int main()':
stove.cpp:13:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |         freopen("task.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
stove.cpp:14:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |         freopen("task.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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