Submission #203517

#	Time	Username	Problem	Language	Result	Execution time	Memory
203517		SoGood	Stove (JOI18_stove)	C++14	0 / 100	5 ms	380 KiB

stove

//#pragma GCC optimize ("Ofast")
//#pragma GCC optimize ("unroll-loops")
//#pragma GCC target("avx,avx2,fma")

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/rope>
#define pb push_back
#define F first
#define S second
#define ins insert
#define mp make_pair
#define fo(i, n1, n, x) for(int i = n1; i <= n; i += x)
#define foo(i, n, n1, x) for(int i = n; i >= n1; i -= x)
#define bit __builtin_popcount
#define md (l + ((r - l) / 2))
#define all(x) x.begin(),x.end()
#define eb emplace_back
#define ub upper_bound
#define lb lower_bound
#define ios ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)
#define file(s) if (fopen(s".in", "r")) freopen(s".in", "r", stdin), freopen(s".out", "w", stdout)

using namespace std;
using namespace __gnu_pbds;
using namespace __gnu_cxx;


using ll = long long;

#define int ll


const int N = 1e5 + 11, mod = 1e9 + 7, mod2 = 998244353;
const int MAX = 1e5 + 11;
const int INF1 = 2e9 + 11;
const ll INF2 = 2e18 + 11;
const double INF3 = 1e8 + 11;
const int base = 500;
const int P = 31;
const int dx[] = {1, -1, 0, 0, 1, 1, -1, -1};
const int dy[] = {0, 0, 1, -1, 1, -1, 1, -1};
const double EPS = 1e-4;
const double PI = acos(-1.0);


template<typename T> using ordered_set = tree <T, null_type, less <T>, rb_tree_tag, tree_order_statistics_node_update>;
template<typename T1, typename T2> inline void chmin(T1 &a, T2 b) { if (a > b) a = b; }
template<typename T1, typename T2> inline void chmax(T1 &a, T2 b) { if (a < b) a = b; }


typedef pair <int, int> pii;
typedef pair <ll, ll> pll;
typedef vector <int> vi;


mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

int n, k, a[N];
main() {
    file("stove");
    ios;
    cin>>n>>k;
    fo(i,1,n,1) cin>>a[i];
    int ans=a[n]-a[1]+1;
    vi v;
    fo(i,2,n,1) v.eb(a[i]-a[i-1]-1);
    sort(all(v),greater<int>());

    --k;
    for (int i = 0; i < k and i < v.size(); ++i) ans-=v[i];
    cout<<ans;
    cerr << "\nTime elapsed: " << (clock() + 0.0) / CLOCKS_PER_SEC;
    return 0;
}
/**
1 3 6
*/

Compilation message (stderr)

stove.cpp:61:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main() {
      ^
stove.cpp: In function 'int main()':
stove.cpp:72:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < k and i < v.size(); ++i) ans-=v[i];
                               ~~^~~~~~~~~~
stove.cpp:23:68: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
 #define file(s) if (fopen(s".in", "r")) freopen(s".in", "r", stdin), freopen(s".out", "w", stdout)
                                         ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
stove.cpp:62:5: note: in expansion of macro 'file'
     file("stove");
     ^~~~
stove.cpp:23:68: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
 #define file(s) if (fopen(s".in", "r")) freopen(s".in", "r", stdin), freopen(s".out", "w", stdout)
                                         ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
stove.cpp:62:5: note: in expansion of macro 'file'
     file("stove");
     ^~~~

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