Submission #638636

#	Time	Username	Problem	Language	Result	Execution time	Memory
638636		VitaliyFS	Feast (NOI19_feast)	C++17	0 / 100	4 ms	596 KiB

feast

#include<bits/stdc++.h>

using namespace std;

#define fr first
#define sc second

typedef long long ll;
typedef pair<ll, ll> pll;
typedef pair<int, int> pii;
typedef long double ld;

const ll INF = 1000000007, DIM = 2007, DIM2 = 107, MAXN = 100007, MOD = 1000000007;

ll tt, mid, res,f, y, t, w,c,root, p[DIM], tin[DIM],ans[DIM], pref[DIM], sz[DIM], tout[DIM], type, a[DIM], b[DIM], ptr, cnt[DIM], sum, pos, h, sx,sy, id, testcase, curans, nn, split, n, m, x, k1, k2, changecnt,k,l,r,v,u, l1,r1,l2,r2;
bool flag, flag2;
pll  dp[DIM];

bool good(ll x) {
	sum=0;
	for(int i=1;i<=n;i++){
		dp[i]={0,0};
		sum=0;
		for(int j=i-1;j>=0;j--) {
			sum+=a[j+1];
			for(int k=j;k>=0;k--) {
				if((dp[k].fr+sum+x>dp[i].fr)||(dp[k].fr+sum+x==dp[i].fr&&dp[k].sc + 1 < dp[i].sc)){
					dp[i].fr = dp[k].fr+sum+x;
					dp[i].sc = dp[k].sc + 1;
				}
			}
		}
	}
	return dp[n].sc >= k;
}

void solve() {
	cin>>n>>k;
	for(int i=1;i<=n;i++){cin>>a[i];pref[i]=pref[i-1]+a[i];}
	l=-INF;r=INF;
	while(l<r){
		mid=(l+r)>>1;
		if(!good(mid))l=mid+1;
		else r =mid;
	}
	good(l);
	cout<<max(dp[n].fr-k*l,0ll)<<'\n';
}

int main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);

	tt=1;
	// freopen("input.txt","r",stdin);
	// freopen("output.txt","w",stdout);
	//cin>>tt;
	while(tt--) {
		solve();
	}
	return 0;
}

• Subtask 1: 0 / 4
• Subtask 2: 0 / 8
• Subtask 3: 0 / 18
• Subtask 4: 0 / 10
• Subtask 5: 0 / 11
• Subtask 6: 0 / 20
• Subtask 7: 0 / 29