Submission #364027

#	Time	Username	Problem	Language	Result	Execution time	Memory
364027		wind_reaper	Boxes with souvenirs (IOI15_boxes)	C++17	0 / 100	1 ms	364 KiB

boxes

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

using namespace std; 

#define dbg(x) cout << "[" << #x << ": " << x << "] ";

long long delivery(int N, int k, int L, int p[]) {
    vector<long long> pref(N+2), suf(N+2), x(N+2);
    x[0] = 0;
    for(int i = 1; i <= N; i++)
    	x[i] = (long long)p[i-1];
    x[N+1] = 1LL*L; 
    pref[0] = 0;
    for(int i = 1; i <= N + 1; i++)
    	pref[i] = (i > k ? 2*x[k*(i/k)] + x[i] : x[i]);

    suf[N+1] = 0;
    for(int i = N; i >= 0; --i)
    	suf[i] = (N - i + 1 > k ? 2*(L - x[N - k*((N-i+1)/k) + 1]) + L - x[i] : L - x[i]);
	
	long long ans = 1e18;

    for(int i = 0; i < N+1; i++)
    	ans = min(ans, pref[i] + suf[i+1] + L - x[i+1] + x[i]);

    return ans; 
}

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:19:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   19 |     for(int i = N; i >= 0; --i)
      |     ^~~
boxes.cpp:22:2: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   22 |  long long ans = 1e18;
      |  ^~~~

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