Submission #129861

#	Time	Username	Problem	Language	Result	Execution time	Memory
129861		MoNsTeR_CuBe	Boxes with souvenirs (IOI15_boxes)	C++17	10 / 100	2 ms	380 KiB

boxes

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

long long delivery(int N, int K, int L, int p[]) {
	#define int long long

	vector< int > left;

	int curr = K;

	int last = 0;

	int currCost = 0;

	for(int i = 0; i < N; i++){
		left.push_back(min(L,2*(p[i])));
		if(i - K >= 0){
            left.back()+=left[i-K];
		}
	}
	//left.push_back(L-last);
	/*cout << "LEFT "<< endl;
	for(int a : left) cout << a << ' ';
	cout << endl;*/

	vector< int > right;

	curr = K;
	last = L;
	currCost = 0;

	for(int i = N-1; i >= 0; i--){
		right.push_back(min(L, 2*(L-p[i])));
		if(i+K < N){
            right.back() += right[i-K];
		}
	}
	//right.push_back(last + currCost);
	/*cout << "RIGHT " << endl;
	for(int a : right) cout << a << ' ';
	cout << endl;*/

	//reverse(right.begin(), right.end());
	int ans = min(right[N - 1], left[N-1]);

	for(int i = 0; i < N; i++){
		if(N - 2 - i < 0) continue;
		//cout << "INDEX " << i << ' ' << left[i] << ' ' << right[N-2-i] << ' ' << min(p[i], L-p[i]) << ' ' << min(p[i+1], L-p[i+1]) << endl;
		//cout << p[N-2-i] << ' ' << L-p[N-2-i] << endl;
		ans = min(ans, left[i] + right[N - 2 - i]);
	}

	return ans;
	#undef int
}

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:10:6: warning: variable 'curr' set but not used [-Wunused-but-set-variable]
  int curr = K;
      ^~~~
boxes.cpp:12:6: warning: variable 'last' set but not used [-Wunused-but-set-variable]
  int last = 0;
      ^~~~
boxes.cpp:14:6: warning: variable 'currCost' set but not used [-Wunused-but-set-variable]
  int currCost = 0;
      ^~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 10 / 10
• Subtask 3: 0 / 15
• Subtask 4: 0 / 15
• Subtask 5: 0 / 20
• Subtask 6: 0 / 30