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Submission #638646

# Submission time Handle Problem Language Result Execution time Memory
638646 2022-09-06T15:29:02 Z VitaliyFS Feast (NOI19_feast) C++17
0 / 100
 4 ms 628 KB 
#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, res1, res2, 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=2;i<=n;i++){
		dp[i]={-INF,0};
		sum=0;
		for(int j=i-1;j>=0;j--) {
			sum+=a[j+1];
			for(int k=j-1;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;
				}
			}
		}
		if(sum+x>dp[i].fr||(sum+x==dp[i].fr&&1<dp[i].sc)){
			dp[i].fr=sum+x;dp[i].sc=1;
		}
	}
	res1 = -INF, res2 = INF;
	for(int i=1;i<=n;i++) {
		if(dp[i].fr > res1 || (dp[i].fr == res && dp[i].sc < res2)){
			res1=dp[i].fr;res2=dp[i].sc;
		}
	}
	return res2 >= 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(res1-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 / 4.0

# Verdict Execution time Memory Grader output
1 Runtime error 2 ms 596 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 596 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #3
0 / 18.0

# Verdict Execution time Memory Grader output
1 Runtime error 2 ms 628 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 29.0

# Verdict Execution time Memory Grader output
1 Runtime error 2 ms 596 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -