/*-----------------------------
Author : TgX.2
10Ti - K28 - CHV
-----------------------------*/
#include <bits/stdc++.h>
#define FOR(i,a,b) for(int i=(a), _b=(b);i<=_b;++i)
#define FORD(i,a,b) for(int i=(a), _b=(b);i>=_b;--i)
#define FORC(i,a,b,c) for(int i=(a), _b=(b), _c=(c);i<=_b;i+=_c)
#define FORSq(i,a,b) for(int i=(a), _b=(b);i*i<=_b;++i)
#define FORSt(i,s) for(int i=0, _s=(int)(s.size());i<_s;++i)
#define fi first
#define se second
#define pb push_back
#define mp make_pair
#define pp pop_back()
#define eb emplace_back
#define ers erase
#define ins insert
#define emp empty()
#define rvs reverse
#define BIT(x,i) (((x)>>(i))&1)
#define MASK(i) (1LL<<(i))
#define CNTBIT(x) __builtin_popcountll(x)
#define ODDBIT(x) __builtin_parityll(x)
#define FIRSTBIT(x) __builtin_ctzll(x)
#define len(x) (int)((x).size())
#define all(x) (x).begin(), (x).end()
#define alln(x,n) (x)+1, (x)+1+(n)
#define _ <<" "<<
#define __ << "\n"
#define ___ << " "
#define ____ << "\t"
#define file "temp"
#define ______________TgX______________ main()
#define int long long
#define intmax 1e9
#define intmin -1e9
#define llongmax 1e18
#define llongmin -1e18
#define memo(a, val) memset((a), (val), sizeof((a)))
using namespace std;
using namespace std::chrono;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<pii> vpii;
typedef vector<pll> vpll;
// int dx[] = {1,-1,0,0} , dy[] = {0,0,1,-1}; // 4 Direction
// int dx[] = {1,-1,0,0,1,1,-1,-1} , dy[] = {0,0,1,-1,1,-1,1,-1}; // 8 Direction
// int dx[] = {1,-1,1,-1,2,2,-2,-2} , dy[] = {2,2,-2,-2,1,-1,1,-1}; // Knight Direction
// int dx[] = {2,-2,1,1,-1,-1} , dy[] = {0,0,1,-1,1,-1}; // Hexagonal Direction
void fastio() {
if (fopen(file".inp", "r")) {
freopen(file".inp", "r", stdin);
freopen(file".out", "w", stdout);
freopen(file".debug", "w", stderr);
}
ios_base::sync_with_stdio(0);
cin.tie(0); cout.tie(0);
}
template<typename T1, typename T2> bool mini(T1 &a, T2 b)
{if(a>b) a=b; else return 0; return 1;}
template<typename T1, typename T2> bool maxi(T1 &a, T2 b)
{if(a<b) a=b; else return 0; return 1;}
/*-----------------------------*/
#define f(x) (x) + 5000
const int maxn = 5007;
int n, a[maxn];
bool vis[maxn][maxn + maxn];
int ans = 0;
int chose[maxn];
void dq(int id, int h, int s, bool dir, int cnt) { // 0 : l -> r | 1 : l <- r
bool is = 0;
vis[h][s + 5000] = 1;
if (vis[h - 1][s + 5000]) is = 1;
if (id > n) {
return maxi(ans, cnt), void();
}
// len
// vis[h + 1][s + a[id] * (dir == 0 ? -1 : 1) + 5000] = 1;
chose[h] = s;
if (s > 0) dq(id + 1, h + 1, s + a[id] * (dir == 0 ? -1 : 1), dir ^ 1, cnt);
dq(id + 1, h, s + a[id] * (dir == 0 ? 1 : -1), dir, cnt + is);
// vis[h + 1][s + a[id] * (dir == 0 ? -1 : 1) + 5000] = 0;
// vis[h][s + a[id] * (dir == 0 ? 1 : -1) + 5000] = 1;
// vis[h][s + a[id] * (dir == 0 ? 1 : -1) + 5000] = 0;
}
void process() {
cin >> n;
FOR(i, 1, n)
cin >> a[i];
dq(1, 1, 0, 0, 0);
cout << ans;
}
/*-----------------------------*/
______________TgX______________ {
auto start = high_resolution_clock::now();
fastio();
process();
auto stop = high_resolution_clock::now();
auto duration = duration_cast<microseconds>(stop - start);
cerr << "Time: " << duration.count() << " ms" << endl;
}
/*==============================+
|INPUT |
--------------------------------|
================================+
|OUTPUT |
--------------------------------|
===============================*/
Compilation message
cigle.cpp:41:41: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
41 | #define ______________TgX______________ main()
| ^~~~
cigle.cpp:121:1: note: in expansion of macro '______________TgX______________'
121 | ______________TgX______________ {
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cigle.cpp: In function 'void fastio()':
cigle.cpp:67:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
67 | freopen(file".inp", "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
cigle.cpp:68:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
68 | freopen(file".out", "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
cigle.cpp:69:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
69 | freopen(file".debug", "w", stderr);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
1 ms |
2648 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
1 ms |
2648 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Execution timed out |
1099 ms |
6492 KB |
Time limit exceeded |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
1 ms |
2648 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
1 ms |
2648 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
