Submission #759079

#	Time	Username	Problem	Language	Result	Execution time	Memory
759079		Blagoj	Boxes with souvenirs (IOI15_boxes)	C++17	100 / 100	740 ms	333032 KiB

boxes

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

using namespace std;

#define ll long long int

long long delivery(int N, int K, int L, int positions[]) {
    vector<int> v;
    for (int i = 0; i < N; i++) {
        if (positions[i] == 0) continue;
        v.push_back(positions[i]);
    }
    sort(v.begin(), v.end());
    ll dpl[v.size()], dpr[v.size()];
    for (int i = 0; i < min((int) v.size(), K); i++) dpl[i] = min(v[i] * 2, v[i] + L - v[i]);
    for (int i = K; i < v.size(); i++) dpl[i] = dpl[i - K] + min(v[i] * 2, v[i] + L - v[i]);
    int c = v.size() - 1;
    for (int i = 0; i < min((int) v.size(), K); i++) dpr[c - i] = min((L - v[c - i]) * 2, v[c - i] + L - v[c - i]);
    for (int i = K; i < v.size(); i++) dpr[c - i] = dpr[c - i + K] + min((L - v[c - i]) * 2, v[c - i] + L - v[c - i]);
    ll ans = min(dpr[0], dpl[v.size() - 1]);
    for (int i = 0; i < v.size() - 1; i++) ans = min(ans, dpl[i] + dpr[i + 1]);
    return ans;
}

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:17:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |     for (int i = K; i < v.size(); i++) dpl[i] = dpl[i - K] + min(v[i] * 2, v[i] + L - v[i]);
      |                     ~~^~~~~~~~~~
boxes.cpp:18:22: warning: conversion from 'std::vector<int>::size_type' {aka 'long unsigned int'} to 'int' may change value [-Wconversion]
   18 |     int c = v.size() - 1;
      |             ~~~~~~~~~^~~
boxes.cpp:20:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |     for (int i = K; i < v.size(); i++) dpr[c - i] = dpr[c - i + K] + min((L - v[c - i]) * 2, v[c - i] + L - v[c - i]);
      |                     ~~^~~~~~~~~~
boxes.cpp:22:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |     for (int i = 0; i < v.size() - 1; i++) ans = min(ans, dpl[i] + dpr[i + 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