Submission #1143833

#	Time	Username	Problem	Language	Result	Execution time	Memory
1143833		SmuggingSpun	Semiexpress (JOI17_semiexpress)	C++20	18 / 100	31 ms	328 KiB

semiexpress

#include<bits/stdc++.h>
#define taskname "B"
using namespace std;
typedef long long ll;
const ll INF = 1e18;
template<class T>void maximize(T& a, T b){
	if(a < b){
		a = b;
	}
}
int n, m, k, A, B, C;
ll T;
namespace sub1{
	void solve(){
		vector<bool>express(n + 1, false);
		for(int _ = 0; _ < m; _++){
			int x;
			cin >> x;
			express[x] = true;
		}	
		int ans = 0;	
		for(int i = 1; i < n; i++){
			for(int j = n; j > i; j--){
				if(!express[i] && !express[j]){
					int cnt = 0;
					for(int k = 2, pre = 1; k <= n; k++){
						if(express[k]){
							pre = k;
						}
						ll sum = 1LL * (pre - 1) * B + min(1LL * (k - pre) * A, min(i >= pre && i <= k ? 1LL * (i - pre) * C + 1LL * (k - i) * A : INF, j >= pre && j <= k ? 1LL * (j - pre) * C + 1LL * (k - j) * A : INF));
						if(sum <= T){
							cnt++;
						}
					}
					maximize(ans, cnt);
				}
			}
		}
		cout << ans;
	}
}
namespace sub23{
	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 >> m >> k >> A >> B >> C >> T;
	if(n <= 300 && k - m == 2){
		sub1::solve();
	}
	else{
		sub23::solve();
	}
}

Compilation message (stderr)

semiexpress.cpp: In function 'int main()':
semiexpress.cpp:50:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   50 |                 freopen(taskname".inp", "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 18 / 18
• Subtask 2: 0 / 30
• Subtask 3: 0 / 52