Submission #81679

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
81679	2018-10-26T06:40:18 Z	wzy	Boxes with souvenirs (IOI15_boxes)	C++11	0 / 100	8 ms	376 KB

boxes

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

long long dpL[10000001] , dpR[10000001]; 

long long delivery(int N, int K, int L, int p[]) {
	#define int long long 
	int ans = (int) 1e18;
	int k = K;
	int n = N;
	int l = L;
	for(int i = 0 ; i < N ;i ++){
		dpL[i] = 2*p[i];
		if(i >= K) dpL[i] = dpL[i-k] + 2*p[i]; // pick the last block and then solve for [0 , i-k]
	}
	for(int j = N - 1 ; j >= 0 ; j--){
		int u = j + K ;
		dpR[j] = 2*(L - p[j]);
		if(u <= n - 1) dpR[j] = dpR[u] + 2*(L - p[j]); 
	}
	for(int j = N - 1 ; j >= 0 ; j--){
		for(int r = 0 ; (j - k*r + 1) >= 0 ; r++){
			int u = j - k*r + 1;
			if(u > j) continue;
			ans = min(ans ,dpL[u] + dpR[j] + L*((j-u+1)/k + ((j-u+1)%k ? 1 : 0)));
		}
		ans = min(ans , dpR[j] + L*((j)/k + (j%k ? 1 : 0)));
		int i = j;
		ans = min(ans ,dpL[j] + L *((n-i-1)/k + ((n-i-1)%k ? 1 : 0)));
	}
    return ans;
}

Compilation message

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:12:6: warning: unused variable 'l' [-Wunused-variable]
  int l = L;
      ^

Subtask #1
0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	376 KB	Output is correct
2	Incorrect	8 ms	376 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #2
0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	376 KB	Output is correct
2	Correct	2 ms	376 KB	Output is correct
3	Correct	2 ms	376 KB	Output is correct
4	Incorrect	2 ms	376 KB	Output isn't correct
5	Halted	0 ms	0 KB	-

Subtask #3
0 / 15.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	256 KB	Output is correct
2	Correct	2 ms	256 KB	Output is correct
3	Correct	2 ms	256 KB	Output is correct
4	Incorrect	2 ms	256 KB	Output isn't correct
5	Halted	0 ms	0 KB	-