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Submission #530405

# Submission time Handle Problem Language Result Execution time Memory
530405 2022-02-25T09:46:33 Z jiahng Cigle (COI21_cigle) C++14
48 / 100
 314 ms 195252 KB 
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
#define int ll
typedef pair<int,int> pi;
typedef vector <ll> vi;
typedef vector <pi> vpi;
typedef pair<pi, ll> pii;
typedef set <ll> si;
typedef long double ld;
#define f first
#define s second
#define mp make_pair
#define FOR(i,s,e) for(int i=s;i<=int(e);++i)
#define DEC(i,s,e) for(int i=s;i>=int(e);--i)
#define pb push_back
#define all(x) (x).begin(), (x).end()
#define lbd(x, y) lower_bound(all(x), y)
#define ubd(x, y) upper_bound(all(x), y)
#define aFOR(i,x) for (auto i: x)
#define mem(x,i) memset(x,i,sizeof x)
#define fast ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0)
#define MOD 1000000007
#define maxn 5001
//~ #define getchar_unlocked _getchar_nolock

int N,D[maxn],ss[maxn];

inline int readInt() {
    int x = 0;
    char ch = getchar_unlocked();
    while (ch < '0' || ch > '9') ch = getchar_unlocked();
    while (ch >= '0' && ch <= '9'){
		x = (x << 3) + (x << 1) + ch - '0';
		ch = getchar_unlocked();
	}
    return x;
}

vpi A[maxn];
int dp[maxn][maxn];

int updates[maxn];
int32_t main() {
    fast;
    N = readInt();
    FOR(i,1,N){
		D[i] = readInt();
		ss[i] = ss[i-1] + D[i];
	}
	FOR(l,2,N) FOR(r,l+1,N-1) if ((ss[l-1] + ss[r]) % 2 == 0){
		int ssb = (ss[l-1] + ss[r]) / 2;
		int b = lower_bound(ss+l,ss+r,ssb) - ss;
		if (ss[b] == ssb ){
			//~ cout << l-1 << ' ' << b << ' ' << r << '\n';
			A[b].pb(pi(l-1,r));
		}
	}
	FOR(i,0,N) reverse(all(A[i]));
	
	
	DEC(i,N,1){
		FOR(k,0,A[i].size()-1){
			int newdp = dp[max(i,A[i][k].s+1)][i] + k + 1;
			if (A[i][k].f - 1 >= 0) updates[A[i][k].f-1] = max(updates[A[i][k].f-1], newdp);
		}
		int mx = 0;
		DEC(j,i-1,0){
			mx = max(mx, updates[j]);
			updates[j] = -1;
			dp[i][j] = max(dp[i+1][j], mx);
		}
	}

	cout << dp[1][0];
	
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 460 KB Output is correct
2 Correct 1 ms 460 KB Output is correct
3 Correct 1 ms 460 KB Output is correct
4 Correct 1 ms 460 KB Output is correct
5 Correct 1 ms 460 KB Output is correct
6 Correct 1 ms 460 KB Output is correct
7 Correct 1 ms 460 KB Output is correct
8 Correct 1 ms 460 KB Output is correct
9 Correct 0 ms 460 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 460 KB Output is correct
2 Correct 1 ms 460 KB Output is correct
3 Correct 1 ms 460 KB Output is correct
4 Correct 1 ms 460 KB Output is correct
5 Correct 1 ms 460 KB Output is correct
6 Correct 1 ms 460 KB Output is correct
7 Correct 1 ms 460 KB Output is correct
8 Correct 1 ms 460 KB Output is correct
9 Correct 0 ms 460 KB Output is correct
10 Correct 1 ms 716 KB Output is correct
11 Correct 1 ms 716 KB Output is correct
12 Correct 1 ms 716 KB Output is correct
13 Correct 1 ms 716 KB Output is correct
14 Correct 1 ms 716 KB Output is correct
15 Correct 1 ms 716 KB Output is correct
16 Correct 1 ms 716 KB Output is correct
17 Correct 1 ms 716 KB Output is correct
18 Correct 1 ms 716 KB Output is correct
19 Correct 1 ms 716 KB Output is correct
20 Correct 1 ms 716 KB Output is correct

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4044 KB Output is correct
2 Correct 3 ms 4556 KB Output is correct
3 Correct 3 ms 4300 KB Output is correct
4 Correct 4 ms 4300 KB Output is correct
5 Correct 4 ms 4428 KB Output is correct
6 Correct 6 ms 4428 KB Output is correct
7 Correct 5 ms 4428 KB Output is correct
8 Correct 5 ms 4428 KB Output is correct
9 Correct 5 ms 4428 KB Output is correct
10 Correct 4 ms 4300 KB Output is correct
11 Correct 6 ms 4172 KB Output is correct
12 Correct 5 ms 4172 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 460 KB Output is correct
2 Correct 1 ms 460 KB Output is correct
3 Correct 1 ms 460 KB Output is correct
4 Correct 1 ms 460 KB Output is correct
5 Correct 1 ms 460 KB Output is correct
6 Correct 1 ms 460 KB Output is correct
7 Correct 1 ms 460 KB Output is correct
8 Correct 1 ms 460 KB Output is correct
9 Correct 0 ms 460 KB Output is correct
10 Correct 1 ms 716 KB Output is correct
11 Correct 1 ms 716 KB Output is correct
12 Correct 1 ms 716 KB Output is correct
13 Correct 1 ms 716 KB Output is correct
14 Correct 1 ms 716 KB Output is correct
15 Correct 1 ms 716 KB Output is correct
16 Correct 1 ms 716 KB Output is correct
17 Correct 1 ms 716 KB Output is correct
18 Correct 1 ms 716 KB Output is correct
19 Correct 1 ms 716 KB Output is correct
20 Correct 1 ms 716 KB Output is correct
21 Correct 3 ms 4044 KB Output is correct
22 Correct 3 ms 4556 KB Output is correct
23 Correct 3 ms 4300 KB Output is correct
24 Correct 4 ms 4300 KB Output is correct
25 Correct 4 ms 4428 KB Output is correct
26 Correct 6 ms 4428 KB Output is correct
27 Correct 5 ms 4428 KB Output is correct
28 Correct 5 ms 4428 KB Output is correct
29 Correct 5 ms 4428 KB Output is correct
30 Correct 4 ms 4300 KB Output is correct
31 Correct 6 ms 4172 KB Output is correct
32 Correct 5 ms 4172 KB Output is correct
33 Correct 3 ms 4044 KB Output is correct
34 Correct 5 ms 4260 KB Output is correct
35 Correct 3 ms 4328 KB Output is correct
36 Correct 3 ms 4428 KB Output is correct
37 Correct 4 ms 4428 KB Output is correct
38 Correct 4 ms 4428 KB Output is correct
39 Correct 4 ms 3660 KB Output is correct
40 Correct 4 ms 3404 KB Output is correct
41 Correct 3 ms 3404 KB Output is correct
42 Correct 4 ms 3404 KB Output is correct
43 Correct 3 ms 3404 KB Output is correct
44 Correct 3 ms 3404 KB Output is correct
45 Correct 3 ms 3404 KB Output is correct
46 Correct 3 ms 3404 KB Output is correct
47 Correct 3 ms 3404 KB Output is correct
48 Correct 3 ms 3404 KB Output is correct
49 Correct 3 ms 3404 KB Output is correct

Subtask #5
0 / 52.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 460 KB Output is correct
2 Correct 1 ms 460 KB Output is correct
3 Correct 1 ms 460 KB Output is correct
4 Correct 1 ms 460 KB Output is correct
5 Correct 1 ms 460 KB Output is correct
6 Correct 1 ms 460 KB Output is correct
7 Correct 1 ms 460 KB Output is correct
8 Correct 1 ms 460 KB Output is correct
9 Correct 0 ms 460 KB Output is correct
10 Correct 1 ms 716 KB Output is correct
11 Correct 1 ms 716 KB Output is correct
12 Correct 1 ms 716 KB Output is correct
13 Correct 1 ms 716 KB Output is correct
14 Correct 1 ms 716 KB Output is correct
15 Correct 1 ms 716 KB Output is correct
16 Correct 1 ms 716 KB Output is correct
17 Correct 1 ms 716 KB Output is correct
18 Correct 1 ms 716 KB Output is correct
19 Correct 1 ms 716 KB Output is correct
20 Correct 1 ms 716 KB Output is correct
21 Correct 3 ms 4044 KB Output is correct
22 Correct 3 ms 4556 KB Output is correct
23 Correct 3 ms 4300 KB Output is correct
24 Correct 4 ms 4300 KB Output is correct
25 Correct 4 ms 4428 KB Output is correct
26 Correct 6 ms 4428 KB Output is correct
27 Correct 5 ms 4428 KB Output is correct
28 Correct 5 ms 4428 KB Output is correct
29 Correct 5 ms 4428 KB Output is correct
30 Correct 4 ms 4300 KB Output is correct
31 Correct 6 ms 4172 KB Output is correct
32 Correct 5 ms 4172 KB Output is correct
33 Correct 3 ms 4044 KB Output is correct
34 Correct 5 ms 4260 KB Output is correct
35 Correct 3 ms 4328 KB Output is correct
36 Correct 3 ms 4428 KB Output is correct
37 Correct 4 ms 4428 KB Output is correct
38 Correct 4 ms 4428 KB Output is correct
39 Correct 4 ms 3660 KB Output is correct
40 Correct 4 ms 3404 KB Output is correct
41 Correct 3 ms 3404 KB Output is correct
42 Correct 4 ms 3404 KB Output is correct
43 Correct 3 ms 3404 KB Output is correct
44 Correct 3 ms 3404 KB Output is correct
45 Correct 3 ms 3404 KB Output is correct
46 Correct 3 ms 3404 KB Output is correct
47 Correct 3 ms 3404 KB Output is correct
48 Correct 3 ms 3404 KB Output is correct
49 Correct 3 ms 3404 KB Output is correct
50 Incorrect 314 ms 195252 KB Output isn't correct
51 Halted 0 ms 0 KB -