Submission #529951

#	Time	Username	Problem	Language	Result	Execution time	Memory
529951		tht2005	K개의 묶음 (IZhO14_blocks)	C++17	100 / 100	99 ms	2928 KiB

blocks

#include <bits/stdc++.h>

using namespace std;

const int N = 100005;
const int INF = 0x3f3f3f3f;
int n, kk, a[N], L[N], f[N], g[N], h[N];

int main() {
    scanf("%d %d", &n, &kk);
    for(int i = 1; i <= n; ++i) {
        scanf("%d", a + i);
        int k = i - 1;
        while(k > 0 && a[i] >= a[k])
            k = L[k];
        L[i] = k;
    }
    f[0] = 0;
    for(int i = 1; i <= n; ++i)
        f[i] = max(f[i - 1], a[i]);
    for(int i = 2; i <= kk; ++i) {
        for(int j = 0; j <= n; ++j) {
            g[j] = f[j];
            f[j] = INF;
        }
        h[i - 1] = INF;
        for(int j = i; j <= n; ++j) {
            h[j] = g[j - 1];
            for(int k = j - 1; k > L[j]; k = L[k])
                h[j] = min(h[j], h[k]);
            f[j] = min(f[L[j]], h[j] + a[j]);
        }
    }
    printf("%d", f[n]);
    return 0;
}

Compilation message (stderr)

blocks.cpp: In function 'int main()':
blocks.cpp:10:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |     scanf("%d %d", &n, &kk);
      |     ~~~~~^~~~~~~~~~~~~~~~~~
blocks.cpp:12:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |         scanf("%d", a + i);
      |         ~~~~~^~~~~~~~~~~~~

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