제출 #1290610

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1290610		SmuggingSpun	Feast (NOI19_feast)	C++20	25 / 100	24 ms	1552 KiB

feast

#include<bits/stdc++.h>
#define taskname "C"
using namespace std;
typedef long long ll;
template<class T>void maximize(T& a, T b){
	if(a < b){
		a = b;
	}
}
const int lim = 3e5 + 5;
const ll INF = 1e18;
int n, k, a[lim];
namespace sub1{
	void solve(){
		cout << accumulate(a + 1, a + n + 1, 0LL);
	}
}
namespace sub2345{
	void solve(){
		vector<vector<ll>>dp(n + 1, vector<ll>(k + 1, -INF));
		dp[0][0] = 0;
		for(int i = 1; i <= n; i++){
			dp[i] = dp[i - 1];
			ll sum = 0;
			for(int j = i; j > 0; j--){
				sum += a[j];
				for(int t = 1; t <= k; t++){
					maximize(dp[i][t], dp[j - 1][t - 1] + sum);
				}
			}
		}
		cout << *max_element(dp[n].begin(), dp[n].end());
	}
}
namespace sub67{
	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(*min_element(a + 1, a + n + 1) > -1){
		sub1::solve();
	}
	else if(max(n, k) <= 300){
		sub2345::solve();
	}
	else{
		sub67::solve();
	}
}

컴파일 시 표준 에러 (stderr) 메시지

feast.cpp: In function 'int main()':
feast.cpp:43:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   43 |                 freopen(taskname".inp", "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 4 / 4
• Subtask 2: 0 / 8
• Subtask 3: 0 / 18
• Subtask 4: 10 / 10
• Subtask 5: 11 / 11
• Subtask 6: 0 / 20
• Subtask 7: 0 / 29