Submission #272745

#	Time	Username	Problem	Language	Result	Execution time	Memory
272745		toonewbie	Boxes with souvenirs (IOI15_boxes)	C++17	100 / 100	635 ms	293932 KiB

boxes

#include "boxes.h"
#include <bits/stdc++.h>

using namespace std;

const int N = 10000005;

long long pref[N], suff[N];

long long delivery(int N, int K, int L, int p[]) {
    for (int i = 0; i < N; i++) {
        pref[i] = (i - K >= -1 ? pref[i - K] + p[i] : p[i]) + min(p[i], L - p[i]);
    }
    for (int i = N - 1; i >= 0; i--) {
        suff[i] = (i + K <= N ? suff[i + K] + L - p[i] : L - p[i]) + min(p[i], L - p[i]);
    }
    long long res = 2000000000000000000;
    for (int i = -1; i < N; i++) {
        res = min(res, pref[i] + suff[i + 1]);
    }
    return res;
}

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:10:48: warning: declaration of 'N' shadows a global declaration [-Wshadow]
   10 | long long delivery(int N, int K, int L, int p[]) {
      |                                                ^
boxes.cpp:6:11: note: shadowed declaration is here
    6 | const int N = 10000005;
      |           ^

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