Submission #936156

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
936156	2024-03-01T09:42:26 Z	shoryu386	The short shank; Redemption (BOI21_prison)	C++17	15 / 100	2000 ms	251984 KB

prison

#include <bits/stdc++.h>
using namespace std;

#define int long long

int n, d, t;
#define MAX 4007

int arr[MAX], dp[MAX][MAX];

int memo[MAX][MAX];
int cost(int l, int r){
	//optimised easily to n^2
	if (memo[l][r] != -1) return memo[l][r];
	
	int ans = 0;

	if (arr[l] <= t) ans++;
	
	int carry = arr[l] + 1;
	for (int x = l+1; x <= r; x++){
		int val = min(arr[x], carry);
		if (val <= t) ans++;
		
		carry = min(carry, arr[x]);
		carry += 1;
	}
	
	return memo[l][r] = ans;
}

main(){
	cin >> n >> d >> t;
	for (int x = 0; x < n; x++) cin >> arr[x];
	
	memset(memo, -1, sizeof(memo));
	memset(dp, 63, sizeof(dp));
	for (int x = 0; x < n; x++){
		dp[x][1] = min(dp[x][1], cost(0, x));
	
		for (int z = 1; z <= n; z++){
			for (int y = 0; y < x; y++){
				dp[x][z] = min(dp[x][z], dp[y][z-1] + cost(y+1, x));
			}
		}
	}
	cout << dp[n-1][d+1];
}

Compilation message

prison.cpp:32:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   32 | main(){
      | ^~~~

Subtask #1

15.0 / 15.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	76 ms	251732 KB	Output is correct
2	Correct	138 ms	251740 KB	Output is correct
3	Correct	110 ms	251792 KB	Output is correct
4	Correct	152 ms	251732 KB	Output is correct
5	Correct	192 ms	251984 KB	Output is correct
6	Correct	153 ms	251728 KB	Output is correct
7	Correct	172 ms	251788 KB	Output is correct
8	Correct	213 ms	251784 KB	Output is correct
9	Correct	166 ms	251732 KB	Output is correct
10	Correct	161 ms	251788 KB	Output is correct
11	Correct	215 ms	251788 KB	Output is correct

Subtask #2

0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	36 ms	251880 KB	Output is correct
2	Runtime error	6 ms	604 KB	Execution killed with signal 11
3	Halted	0 ms	0 KB	-

Subtask #3

0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	76 ms	251732 KB	Output is correct
2	Correct	138 ms	251740 KB	Output is correct
3	Correct	110 ms	251792 KB	Output is correct
4	Correct	152 ms	251732 KB	Output is correct
5	Correct	192 ms	251984 KB	Output is correct
6	Correct	153 ms	251728 KB	Output is correct
7	Correct	172 ms	251788 KB	Output is correct
8	Correct	213 ms	251784 KB	Output is correct
9	Correct	166 ms	251732 KB	Output is correct
10	Correct	161 ms	251788 KB	Output is correct
11	Correct	215 ms	251788 KB	Output is correct
12	Correct	33 ms	251756 KB	Output is correct
13	Correct	107 ms	251736 KB	Output is correct
14	Correct	104 ms	251728 KB	Output is correct
15	Correct	214 ms	251796 KB	Output is correct
16	Correct	244 ms	251728 KB	Output is correct
17	Correct	161 ms	251792 KB	Output is correct
18	Correct	160 ms	251668 KB	Output is correct
19	Correct	154 ms	251784 KB	Output is correct
20	Correct	162 ms	251784 KB	Output is correct
21	Correct	196 ms	251784 KB	Output is correct
22	Correct	176 ms	251784 KB	Output is correct
23	Execution timed out	2045 ms	251808 KB	Time limit exceeded
24	Halted	0 ms	0 KB	-

Subtask #4

0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	34 ms	251656 KB	Output is correct
2	Runtime error	7 ms	604 KB	Execution killed with signal 11
3	Halted	0 ms	0 KB	-

Subtask #5

0 / 25.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	76 ms	251732 KB	Output is correct
2	Correct	138 ms	251740 KB	Output is correct
3	Correct	110 ms	251792 KB	Output is correct
4	Correct	152 ms	251732 KB	Output is correct
5	Correct	192 ms	251984 KB	Output is correct
6	Correct	153 ms	251728 KB	Output is correct
7	Correct	172 ms	251788 KB	Output is correct
8	Correct	213 ms	251784 KB	Output is correct
9	Correct	166 ms	251732 KB	Output is correct
10	Correct	161 ms	251788 KB	Output is correct
11	Correct	215 ms	251788 KB	Output is correct
12	Correct	33 ms	251756 KB	Output is correct
13	Correct	107 ms	251736 KB	Output is correct
14	Correct	104 ms	251728 KB	Output is correct
15	Correct	214 ms	251796 KB	Output is correct
16	Correct	244 ms	251728 KB	Output is correct
17	Correct	161 ms	251792 KB	Output is correct
18	Correct	160 ms	251668 KB	Output is correct
19	Correct	154 ms	251784 KB	Output is correct
20	Correct	162 ms	251784 KB	Output is correct
21	Correct	196 ms	251784 KB	Output is correct
22	Correct	176 ms	251784 KB	Output is correct
23	Execution timed out	2045 ms	251808 KB	Time limit exceeded
24	Halted	0 ms	0 KB	-

Subtask #6

0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	76 ms	251732 KB	Output is correct
2	Correct	138 ms	251740 KB	Output is correct
3	Correct	110 ms	251792 KB	Output is correct
4	Correct	152 ms	251732 KB	Output is correct
5	Correct	192 ms	251984 KB	Output is correct
6	Correct	153 ms	251728 KB	Output is correct
7	Correct	172 ms	251788 KB	Output is correct
8	Correct	213 ms	251784 KB	Output is correct
9	Correct	166 ms	251732 KB	Output is correct
10	Correct	161 ms	251788 KB	Output is correct
11	Correct	215 ms	251788 KB	Output is correct
12	Correct	36 ms	251880 KB	Output is correct
13	Runtime error	6 ms	604 KB	Execution killed with signal 11
14	Halted	0 ms	0 KB	-