제출 #1168446

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1168446		SmuggingSpun	K blocks (IZhO14_blocks)	C++20	53 / 100	1 ms	400 KiB

blocks

#include<bits/stdc++.h>
#define taskname "B"
using namespace std;
const int INF = 1e9;
const int lim = 1e5 + 5;
template<class T>void minimize(T& a, T b){
    if(a > b){
        a = b;
    }
}
template<class T>void maximize(T& a, T b){
    if(a < b){
        a = b;
    }
}
int n, k, a[lim];
namespace sub123{
    void solve(){
        vector<int>dp(n + 1, INF);
        for(int _ = dp[0] = 0; _ < k; _++){
            vector<int>ndp(n + 1, INF);
            for(int i = 1; i <= n; i++){
                int cur_max = 0;
                for(int j = i; j > 0; j--){
                    maximize(cur_max, a[j]);
                    minimize(ndp[i], dp[j - 1] + cur_max);
                }
            }
            swap(dp, ndp);
        }
        cout << dp[n];
    }
}
namespace sub4{
    void solve(){

    }
}
int main(){
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	if(fopen(taskname".inp", "r")){
		freopen(taskname".inp", "r", stdin);
	}
    cin >> n >> k;
    for(int i = 1; i <= n; i++){
        cin >> a[i];
    }
    if(n <= 100){
        sub123::solve();
    }
    else{
        sub4::solve();
    }
}

컴파일 시 표준 에러 (stderr) 메시지

blocks.cpp: In function 'int main()':
blocks.cpp:42:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   42 |                 freopen(taskname".inp", "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

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