Submission #1278363

#	Time	Username	Problem	Language	Result	Execution time	Memory
1278363		longdeptrai	Stove (JOI18_stove)	C++20	100 / 100	20 ms	2248 KiB

stove

#include <bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
//using namespace __gnu_pbds;
#define LongDepTrai "stove"
#define ll long long
#define int long long
#define ull unsigned long long
#define ld long double
#define ii pair<int,int>
#define iii pair<int,ii>
#define iv pair<ii,ii>
#define pll pair<ll,ll>
#define vi vector<int>
#define vii vector<ii>
#define vll vector<ll>
#define fi first
#define se second
#define pb push_back
#define all(x) (x).begin(), (x).end()
#define sz(x) int((x).size())
#define order_set(T) tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>

inline ll add(ll a, ll b, ll mod){ a += b; if(a >= mod) a -= mod; return a; }
inline ll sub(ll a, ll b, ll mod){ a -= b; if(a < 0) a += mod; return a; }
inline ll mul(ll a, ll b, ll mod){ return ( (ll)a * b ) % mod; }

static mt19937_64 rng((unsigned)chrono::steady_clock::now().time_since_epoch().count());
const int N=1e5+9;
int n,k,t[N];
signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);

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

    cin>>n>>k;
    for(int i=1;i<=n;i++){
        cin>>t[i];
    }
    priority_queue<int,vector<int>,less<int>>q;
    for(int i=2;i<=n;i++){
        q.push(t[i]-t[i-1]-1);
    }
    int s=t[n]-t[1]+1;
    for(int i=1;i<k;i++){
        s-=q.top();
        q.pop();
    }
    cout<<s;

    return 0;
}

Compilation message (stderr)

stove.cpp: In function 'int main()':
stove.cpp:37:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |         freopen(LongDepTrai".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
stove.cpp:38:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |         freopen(LongDepTrai".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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