제출 #1040390

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1040390		vjudge1	K개의 묶음 (IZhO14_blocks)	C++17	53 / 100	1066 ms	42856 KiB

blocks

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

#define f(i, a, b) for (int i = a; i <= b; i++)
#define fo(i, a, b) for (int i = a; i >= b; i--)
#define minimize(a, b) a = (a < b ? a : b)
#define maximize(a, b) a = (a > b ? a : b) 
#define fi first
#define se second
#define ll long long
#define pii pair <int, int>
#define pb push_back
#define pi acos(-1)
#define sz(a) (int)a.size()
#define getbit(a, b) (((a) >> (b)) & 1)
#define INOUT "main"
#define INFT 0x3f3f3f3f
#define debug(args...) { string _s = #args; replace(_s.begin(), _s.end(), ',', ' '); stringstream _ss(_s); istream_iterator<string> _it(_ss); err(_it, args); }
void err(istream_iterator<string> it) {}
template<typename T, typename... Args>
void err(istream_iterator<string> it, T a, Args... args)
{
    cout << *it << " = [" << a << "]" << '\n';
    err(++it, args...);
}
#define debug1(a, st, en) { cout << #a << " = ["; int kt = false; f(i, st, en) {if (kt) cout << ", "; kt = true; cout << a[i];} cout << "]\n"; } 

void ctime()
{
    cerr << "\n" << "\nTime elapsed: " << 1000 * clock() / CLOCKS_PER_SEC << "ms\n";
}

void file()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);
    if (fopen(INOUT".INP", "r")) 
    {
        freopen(INOUT".INP", "r", stdin); 
        freopen(INOUT".OUT", "w", stdout);
    }
}

const int MX_N = 1e5 + 5;
int n, k;
int a[MX_N];
int dp[MX_N][105];
int rmq[25][MX_N];

void build()
{
    f(i, 1, n) rmq[0][i] = a[i];

    f(u, 1, 20)
            f(i, 1, n - (1 << u) + 1)
                    rmq[u][i] = max(rmq[u - 1][i], rmq[u - 1][i + (1 << (u - 1))]);
}

int get(int l, int r)
{
    int k = __lg(r - l + 1);
    return max(rmq[k][l], rmq[k][r - (1 << k) + 1]);
}

int main()
{
    file();

    memset(dp, INFT, sizeof dp);

    cin >> n >> k;
    f(i, 1, n) cin >> a[i];
    build();

    dp[0][0] = 0;
    f(i, 1, n)
            f(j, 1, min(i, k)) 
                    f(u, 0, i - 1)
                            minimize(dp[i][j], dp[u][j - 1] + get(u + 1, i));

    cout << dp[n][k];

    ctime();
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

blocks.cpp: In function 'void file()':
blocks.cpp:39:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   39 |         freopen(INOUT".INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
blocks.cpp:40:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |         freopen(INOUT".OUT", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 14 / 14
• Subtask 2: 18 / 18
• Subtask 3: 21 / 21
• Subtask 4: 0 / 47