Submission #1283248

#	Time	Username	Problem	Language	Result	Execution time	Memory
1283248		tull	Stove (JOI18_stove)	C++20	0 / 100	2 ms	572 KiB

stove

#include<bits/stdc++.h>
using namespace std;
#define int long long 
#define bp '\n'
signed main(){
#ifdef LOCAL
    freopen("input.txt", "r", stdin);
#endif
    cin.tie(nullptr)->sync_with_stdio(false);
    int n,k,l=0,r=0,x,m,t,ans=1e18;
    cin>>n>>k;
    vector<int>a(n);
    for(auto&e:a){
        cin>>e;
        r+=e;
    }
    while(l<r){
        m=l+(r-l)/2;
        int st=a[0],sc=1,val=0;
        for(int i=1;i<n;++i){
            if(a[i]-st+1>m){
                val+=a[i-1]-st+1;
                st=a[i];
                ++sc;
            }
        }
        val+=a.back()-st+1;
        if(sc>k){
            l=m+1;
        }else{
            r=m;
            ans=min(ans,val);
        }
        //cout<<"-> "<<m<<' '<<sc<<' '<<val<<bp;
    }
    cout<<ans;
    return 0;
}
/*

*/

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