JOI2018-yo-4.cpp

#include <bits/stdc++.h>  
 
using namespace std;
 
//#define int long long
#define FOR(i, j, k) for(int i = j; i < k; ++i)
#define rep(i, j) FOR(i, 0, j)
#define INF (1 << 30)
#define fi first
#define se second
 
typedef unsigned long long ull;
typedef pair<int, int> P;
typedef pair<P, int> Pi;
typedef pair<P, P> PP;
 
const int MOD = 1e9 + 7;
const int dy[]={0, 0, 1, -1};
const int dx[]={1, -1, 0, 0};
 
template <class T> void chmin(T& a, const T& b) { a = min(a, b); }
template <class T> void chmax(T& a, const T& b) { a = max(a, b); }
 
int dp[51][50001];
int N, L[50];
int sum[51];
 
signed main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
 
    memset(dp, -1, sizeof(dp));
    dp[0][0] = INF;
    cin >> N;
    rep(i, N) cin >> L[i];
    sum[1] = L[0];
    FOR(i, 1, N) sum[i + 1] = sum[i] + L[i];
    rep(i, N) rep(j, sum[N]) {
        if(dp[i][j] != -1) {
            FOR(k, i, N) {
                int latte = min(dp[i][j], sum[k + 1] - sum[i]);
                int malta = max(j, sum[k + 1] - sum[i]);
                chmax(dp[k + 1][malta], latte);
            }
        }
    }
    int res = INF;
    rep(i, sum[N]) if(dp[N][i] != -1) {
        chmin(res, i - dp[N][i]);
    }
    cout << res << endl;
    return 0;
}