Submission #704788

#	Time	Username	Problem	Language	Result	Execution time	Memory
704788		bachhoangxuan	Stove (JOI18_stove)	C++17	100 / 100	19 ms	2288 KiB

stove

// Judges with GCC >= 12 only needs Ofast
// #pragma GCC optimize("O3,no-stack-protector,fast-math,unroll-loops,tree-vectorize")
// MLE optimization
// #pragma GCC optimize("conserve-stack")
// Old judges
// #pragma GCC target("sse4.2,popcnt,lzcnt,abm,mmx,fma,bmi,bmi2")
// New judges. Test with assert(__builtin_cpu_supports("avx2"));
// #pragma GCC target("avx2,popcnt,lzcnt,abm,bmi,bmi2,fma,tune=native")
// Atcoder
// #pragma GCC target("avx2,popcnt,lzcnt,abm,bmi,bmi2,fma")
#include<bits/stdc++.h>
using namespace std;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
uniform_real_distribution<> pp(0.0,1.0);
#define ld long double
#define pii pair<int,int>
#define piii pair<int,pii>
#define fi first
#define se second
const int inf=1e9;
const int mod=998244353;
const int mod2=1e9+7;
const int maxn=100005;
const int maxm=200005;
const int maxq=500005;
const int maxl=20;
const int maxa=1000005;
int power(int a,int n){
    int res=1;
    while(n){
        if(n&1) res=res*a%mod;
        a=a*a%mod;n>>=1;
    }
    return res;
}
int t[maxn];
void solve(){
    int n,k;cin >> n >> k;
    for(int i=1;i<=n;i++) cin >> t[i];
    int res=t[n]-t[1]+1;
    vector<int> s;
    for(int i=2;i<=n;i++) s.push_back(t[i]-t[i-1]-1);
    sort(s.begin(),s.end(),greater<int>());
    for(int i=0;i<k-1;i++) res-=s[i];
    cout << res << '\n';
}
signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);cout.tie(NULL);
    int test=1;//cin >> test;
    while(test--) solve();
}

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