제출 #126165

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
126165		abacaba	Kas (COCI17_kas)	C++14	0 / 100	13 ms	5880 KiB

kas

#include <bits/stdc++.h>
using namespace std;

#define max3(a, b, c) max(a, max(b, c))
#define min3(a, b, c) min(a, min(b, c))
#define mp make_pair
#define f first
#define se second
#define pb push_back
#define ppb pop_back
#define ll long long
#define ull unsigned long long
#define cntbit(x) __builtin_popcount(x)
#define uset unordered_set
#define umap unordered_map
#define pii pair<int, int>
#define ld long double
#define pll pair<long long, long long>

const int inf = 2e9;
const int N = 1e5 + 15;
const int M = 5e2 + 15;
int n, m, a[M], ans;
bitset <N> dp1, dp2[M];
int summ = 0;

int main() {
	cin >> n;
	for(int i = 1; i <= n; ++i) {
		cin >> a[i];
		summ += a[i];
	}
	dp1[0] = dp2[n+1][0] = 1;
	for(int i = n; i; --i)
		dp2[i] |= (dp2[i+1] << a[i]);
	for(int i = 1; i <= n; ++i) {
		dp1 |= (dp1 << a[i]);
		bitset <N> nw = (dp1 & dp2[i+1]);
		int x = nw._Find_first();
		if(!x)
			x = nw._Find_next(x);
		if(x < N)
			ans = max(ans, x + (summ - 2 * x));
	}
	cout << ans;
    return 0;
}

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