Submission #341034

#	Time	Username	Problem	Language	Result	Execution time	Memory
341034		12tqian	Boxes with souvenirs (IOI15_boxes)	C++17	10 / 100	1 ms	364 KiB

boxes

#include "boxes.h"
#include <bits/stdc++.h>
typedef long long ll;
const ll INF = 2e9;
long long delivery(int N, int K, int L, int p[]) {
    using namespace std;
    auto range = [&](int l, int r) -> int {
        ll res = INF;
        int mx = -INF;
        int mn = INF;
        for (int i = l; i <= r; i++) {
            mx = max(mx, p[i]);
            mn = min(mn, p[i]);
        }
        res = min(res, 2LL * mx);
        res = min(res, 2LL * (L - mn));
        res = min(res, (ll) L);
        return res;
    };
    ll ans = 1e18;
    auto solve = [&]() {
        ll res = 0;
        for (int l = 0; l < N; l += K) {
            int r = l+K-1;
            r = min(r, N-1);
            res += range(l, r);
        }
        ans = min(ans, res);
    };
    solve();
    int loc = 0;
    for (int i = 0; i < N; i++) {
        if (p[i] != 0) {
            loc = i;
            break;
        }
    }
    if (loc < N) 
        reverse(p+loc, p+N);
    for (int i = loc; i < N; i++)
        p[i] = (L-p[i])%L;
    solve();
    return ans;
}

Compilation message (stderr)

boxes.cpp: In lambda function:
boxes.cpp:18:16: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   18 |         return res;
      |                ^~~

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