제출 #142563

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
142563		12tqian	Split the sequence (APIO14_sequence)	C++14	0 / 100	16 ms	6892 KiB

sequence

#pragma comment(linker, "/stack:200000000")
//#pragma GCC optimize("Ofast")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")
#include <bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>

using namespace std;
using namespace __gnu_pbds;
template <class T> using Tree = tree<T, null_type, less<T>, rb_tree_tag,tree_order_statistics_node_update>;

const double PI = 4 * atan(1);

#define sz(x) (int)(x).size()
#define ll long long
#define ld long double
#define mp make_pair
#define pb push_back
#define eb emplace_back
#define pii pair <int, int>
#define vi vector<int>
#define f first
#define s second
#define lb lower_bound
#define ub upper_bound
#define all(x) x.begin(), x.end()
#define vpi vector<pair<int, int>>
#define vpd vector<pair<double, double>>
#define pd pair<double, double>

#define f0r(i,a) for(int i=0;i<a;i++)
#define f1r(i,a,b) for(int i=a;i<b;i++)
#define trav(a, x) for (auto& a : x)

void fast_io(){
    ios_base::sync_with_stdio(0);
    cin.tie(NULL);
    cout.tie(NULL);
}
void io(string taskname){
    string fin = taskname + ".in";
    string fout = taskname + ".out";
    const char* FIN = fin.c_str();
    const char* FOUT = fout.c_str();
    freopen(FIN, "r", stdin);
    freopen(FOUT, "w", stdout);
    fast_io();
}
const int MAXN = 1e5 + 5;
const int MAXK = 2e2 + 5;
ll dp[MAXK][MAXN];
ll pre[MAXN];
vector<ll> a;
ll get(int l, int r){return pre[r] - (l == 0? 0: pre[l-1]);}
int bef[MAXK][MAXN];
int main(){
    fast_io();
    int n, k;
    cin >> n >> k;
    k++;
    f0r(i, n){
        int ai;
        cin >> ai;
        a.eb(ai);
        if(i == 0) pre[i] = ai;
        else pre[i] = pre[i-1] + ai;
    }
    ll res = pre[n-1]*pre[n-1];
    f0r(i, n){
        dp[1][i] = get(0, i)*get(0, i);
        bef[1][i] = -1;
    }
    f1r(i, 2, k+1){
        int best = i-2;
        f1r(j,i-1, n){
            while(best+1<j){
                ll v1 = dp[i-1][best] + get(best+1, j)*get(best+1, j);
                ll v2 = dp[i-1][best+1] + get(best+2, j)*get(best + 2, j);
                if(v2<v1){
                    best++;
                }
                else break;
            }
            dp[i][j] = dp[i-1][best] + get(best+1, j)*get(best+1, j);
            bef[i][j] = best;
        }
    }
    res -= dp[k][n-1];
    res/=2;
   // cout << dp[3][4] << endl;
    cout << res << endl;
    vi ans;
    int f = k;
    int s = n-1;
    while(bef[f][s] != -1){
        ans.eb(bef[f][s]);
        s = bef[f][s];
        f--;

    }
    reverse(all(ans));
    for(int x: ans) cout << x+1 << " ";
    cout << endl;

    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

sequence.cpp:1:0: warning: ignoring #pragma comment  [-Wunknown-pragmas]
 #pragma comment(linker, "/stack:200000000")
 
sequence.cpp: In function 'void io(std::__cxx11::string)':
sequence.cpp:47:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     freopen(FIN, "r", stdin);
     ~~~~~~~^~~~~~~~~~~~~~~~~
sequence.cpp:48:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     freopen(FOUT, "w", stdout);
     ~~~~~~~^~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 11
• Subtask 2: 0 / 11
• Subtask 3: 0 / 11
• Subtask 4: 0 / 17
• Subtask 5: 0 / 21
• Subtask 6: 0 / 29