Submission #890793

#	Time	Username	Problem	Language	Result	Execution time	Memory
890793		Kutan	Split the sequence (APIO14_sequence)	C++14	50 / 100	99 ms	2904 KiB

sequence

// Cao Quang Hung
#include <cassert>
#include <cctype>
#include <cerrno>
#include <cfloat>
#include <ciso646>
#include <climits>
#include <clocale>
#include <cmath>
#include <csetjmp>
#include <csignal>
#include <cstdarg>
#include <cstddef>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <ccomplex>
#include <cfenv>
#include <cinttypes>
#include <cstdbool>
#include <cstdint>
#include <ctgmath>
#include <cwchar>
#include <cwctype>
#include <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <exception>
#include <fstream>
#include <functional>
#include <iomanip>
#include <ios>
#include <iosfwd>
#include <iostream>
#include <istream>
#include <iterator>
#include <limits>
#include <list>
#include <locale>
#include <map>
#include <memory>
#include <new>
#include <numeric>
#include <ostream>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <stdexcept>
#include <streambuf>
#include <string>
#include <typeinfo>
#include <utility>
#include <valarray>
#include <vector>
#include <array>
#include <atomic>
#include <chrono>
#include <condition_variable>
#include <forward_list>
#include <future>
#include <initializer_list>
#include <mutex>
#include <random>
#include <ratio>
#include <regex>
#include <scoped_allocator>
#include <system_error>
#include <thread>
#include <tuple>
#include <typeindex>
#include <type_traits>
#include <unordered_map>
#include <unordered_set>

using namespace std;
#define pb push_back
#define eb emplace_back
#define mp make_pair
#define pii pair<int,int>
#define pll pair<long long , long long>
#define vi vector<int>
#define vpii vector<pii>
#define SZ(x) ((int)(x.size()))
#define fi first
#define se second
#define IN(x,y) ((y).find((x))!=(y).end())
#define ALL(t) t.begin(),t.end()
#define FOREACH(i,t) for (typeof(t.begin()) i=t.begin(); i!=t.end(); i++)
#define REP(i,a,b) for(int (i)=(a);(i)<=(b);++i)
#define REPD(i,a,b) for(int (i)=(a); (i)>=(b);--i)
#define FOR(i, n) for (int (i) = 0; (i) < (n); ++(i))
#define dem(x) __builtin_popcount(x)
#define Mask(x) (1LL << (x))
#define BIT(x, i) ((x) >> (i) & 1)
#define ln '\n'
#define io_faster ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
///mt19937 rnd(time(0));

const int INF = 1e9 , mod = 1e9 + 7;

template <class T1, class T2>
inline T1 mul(T1& x, const T2 &k){ return x = (1LL * x * k) % mod; }

template <class T1 , class T2>
inline T1 pw(T1 x, T2 k){T1 res = 1; for (; k ; k >>= 1){ if (k & 1) mul(res, x); mul(x, x); } return res;}

template <class T>
inline bool minimize(T &x, const T &y){ if (x > y){x = y; return 1;} return 0; }

template <class T>
inline bool maximize(T &x, const T &y){ if (x < y){x = y; return 1;} return 0; }

template <class T>
inline void add(T &x , const T &y){ if ((x += y) >= mod) x -= mod; }

template <class T>
inline T product (const T &x , const T &y) { return 1LL * x * y % mod; }

#define PROB "a"
void file(){
    if(fopen(PROB".inp", "r")){
        freopen(PROB".inp","r",stdin);
        freopen(PROB".out","w",stdout);
    }
}
void sinh_(){
//    srand(time(0));
//    freopen(PROB".inp" , "w" , stdout);
//    int n;
}

typedef long long ll;
typedef double db;
const int N = 1e3 + 5;

ll dp[N][205];
int n, k, a[N], pre[N], pf[N][205];
void readip(){
    cin >> n >> k;
    ++k;
    REP(i, 1, n) cin >> a[i];
    pre[0] = 0;
    REP(i, 1, n) pre[i] = pre[i - 1] + a[i];
}


void solve(){   
    memset(dp, -0x3f, sizeof dp);
    dp[0][0] = 0;
    REP(j, 1, k) REP(i, j, n) {
        REPD(x, i, j) 
            if (maximize(dp[i][j], dp[x - 1][j - 1] + 1LL * (pre[n] - pre[i]) * (pre[i] - pre[x - 1])))
                pf[i][j] = x;
    }
    int i = n;
    vi ans;
    REPD(j, k, 1) {
        int nxt = pf[i][j];
        if (j > 1) ans.eb(nxt - 1);
        i = nxt - 1;
    }
    reverse(ALL(ans));
    cout << dp[n][k] << ln;
    for (int x : ans) cout << x << ' '; cout << ln;
}

int main(){
    sinh_();
    io_faster
    file();
    int t = 1;
//    cin >> t;
    while (t--){
        readip();
        solve();
    }
}

Compilation message (stderr)

sequence.cpp: In function 'void readip()':
sequence.cpp:92:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   92 | #define REP(i,a,b) for(int (i)=(a);(i)<=(b);++i)
      |                            ^
sequence.cpp:144:5: note: in expansion of macro 'REP'
  144 |     REP(i, 1, n) cin >> a[i];
      |     ^~~
sequence.cpp:92:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   92 | #define REP(i,a,b) for(int (i)=(a);(i)<=(b);++i)
      |                            ^
sequence.cpp:146:5: note: in expansion of macro 'REP'
  146 |     REP(i, 1, n) pre[i] = pre[i - 1] + a[i];
      |     ^~~
sequence.cpp: In function 'void solve()':
sequence.cpp:92:28: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   92 | #define REP(i,a,b) for(int (i)=(a);(i)<=(b);++i)
      |                            ^
sequence.cpp:153:5: note: in expansion of macro 'REP'
  153 |     REP(j, 1, k) REP(i, j, n) {
      |     ^~~
sequence.cpp:92:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   92 | #define REP(i,a,b) for(int (i)=(a);(i)<=(b);++i)
      |                            ^
sequence.cpp:153:18: note: in expansion of macro 'REP'
  153 |     REP(j, 1, k) REP(i, j, n) {
      |                  ^~~
sequence.cpp:93:29: warning: unnecessary parentheses in declaration of 'x' [-Wparentheses]
   93 | #define REPD(i,a,b) for(int (i)=(a); (i)>=(b);--i)
      |                             ^
sequence.cpp:154:9: note: in expansion of macro 'REPD'
  154 |         REPD(x, i, j)
      |         ^~~~
sequence.cpp:93:29: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   93 | #define REPD(i,a,b) for(int (i)=(a); (i)>=(b);--i)
      |                             ^
sequence.cpp:160:5: note: in expansion of macro 'REPD'
  160 |     REPD(j, k, 1) {
      |     ^~~~
sequence.cpp:167:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  167 |     for (int x : ans) cout << x << ' '; cout << ln;
      |     ^~~
sequence.cpp:167:41: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
  167 |     for (int x : ans) cout << x << ' '; cout << ln;
      |                                         ^~~~
sequence.cpp: In function 'void file()':
sequence.cpp:125:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  125 |         freopen(PROB".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
sequence.cpp:126:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  126 |         freopen(PROB".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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