Submission #117500

#	Time	Username	Problem	Language	Result	Execution time	Memory
117500		zubec	Boxes with souvenirs (IOI15_boxes)	C++14	100 / 100	551 ms	221148 KiB

boxes

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

const int N = 10000005;

long long dp[N], dp2[N];

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

    int mid = L/2;
    int lstPos = -1;
    for (int i = 1; i <= N; i++){
        int pos = p[i-1];
        dp[i] = dp[max(0, i-K)] + min(L, pos*2);
    }
    long long ans = 1e18;
    for (int i = N; i >= 1; i--){
        int pos = p[i-1];
        dp2[i] = dp2[min(N+1, i+K)] + min(L, (L-pos)*2);
        ans = min(ans, dp[i]+dp2[i+1]);
    }
    ans = min(ans, dp[0]+dp2[1]);
    return ans;

}

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:9:48: warning: declaration of 'N' shadows a global declaration [-Wshadow]
 long long delivery(int N, int K, int L, int p[]) {
                                                ^
boxes.cpp:5:11: note: shadowed declaration is here
 const int N = 10000005;
           ^
boxes.cpp:11:9: warning: unused variable 'mid' [-Wunused-variable]
     int mid = L/2;
         ^~~
boxes.cpp:12:9: warning: unused variable 'lstPos' [-Wunused-variable]
     int lstPos = -1;
         ^~~~~~

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