제출 #1040379

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1040379		vjudge1	K개의 묶음 (IZhO14_blocks)	C++17	53 / 100	1046 ms	83288 KiB

blocks

#include <bits/stdc++.h>
#define Y8o "K blocks"
#define maxn (int) 1e5 + 5
#define ll long long
#define pii pair<ll, ll>
#define gb(i, j) ((i >> j) & 1)
#define all(x) x.begin(), x.end()
#define _left id * 2, l, mid
#define _right id * 2 + 1, mid + 1, r
 
//#define f first
//#define s second
 
using namespace std;
 
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
ll GetRandom(ll l, ll r) {
    return uniform_int_distribution<ll> (l, r) (rng);
}
void iof() {
    if(fopen(Y8o".in", "r"))
    {
        freopen(Y8o".in", "r", stdin);
        freopen(Y8o".out", "w", stdout);
    }
    ios_base::sync_with_stdio(0);
    cin.tie(NULL), cout.tie(NULL);
}
void ctime() {
    cerr << "\n" << "\nTime elapsed: " << 1000 * clock() / CLOCKS_PER_SEC << "ms\n";
}
 
 
int n, k;
int a[maxn];
ll s[maxn], dp[105][maxn];
 
void solve()
{
    cin >> n >> k;
    for(int i = 1; i <= n; i ++) cin >> a[i], s[i] = s[i - 1] + a[i];
 
    memset(dp, 0x3f, sizeof dp);
 
    int mx2 = 0;
    for(int i = 1; i <= n; i ++) mx2 = max(mx2, a[i]), dp[1][i] = mx2;
 
    for(int i = 2; i <= k; i ++) {
        for(int j = 1; j <= n; j ++) {
            int mx = 0;
            for(int t = j; t >= 1; t --) {
                mx = max(mx, a[t]);
                dp[i][j] = min(dp[i][j], dp[i - 1][t - 1] + mx);
            }
        }
    }
 
    cout << dp[k][n];
}
 
 
int main()
{
    iof();
 
    int nTest = 1;
//    cin >> nTest;
 
    while(nTest --) {
        solve();
    }
 
    ctime();
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

blocks.cpp: In function 'void iof()':
blocks.cpp:23:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |         freopen(Y8o".in", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
blocks.cpp:24:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |         freopen(Y8o".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

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