Submission #575063

#	Time	Username	Problem	Language	Result	Execution time	Memory
575063		stevancv	Boxes with souvenirs (IOI15_boxes)	C++14	0 / 100	1 ms	256 KiB

boxes

#include <bits/stdc++.h>
#include "boxes.h"
#define ll long long
#define ld long double
#define sp ' '
#define en '\n'
#define smin(a, b) a = min(a, b)
#define smax(a, b) a = max(a, b)
using namespace std;
ll delivery(int N, int K, int D, int pos[]) {
    ll n = N; ll k = K; ll d = D;
    vector<ll> a, b;
  	for (int i = 0; i < n - 1; i++) assert(pos[i] <= pos[i + 1]);
    for (int i = 0; i < n; i++) {
        if (pos[i] <= d / 2) a.push_back(pos[i]);
        else b.push_back(pos[i]);
    }
    ll ans = 0;
    for (int i = k - 1; i < a.size(); i += k) ans += 2 * a[i];
    reverse(b.begin(), b.end());
    for (int i = k - 1; i < b.size(); i += k) ans += 2 * (d - b[i]);
    vector<ll> c;
    int p = (a.size() / k) * k;
    int q = (b.size() / k) * k;
    for (int i = p; i < a.size(); i++) c.push_back(a[i]);
    for (int i = b.size() - 1; i >= q; i--) c.push_back(b[i]);
    ll add = 1e18;
    int x = c.size();
    for (int i = 0; i < x; i++) {
        if (i + 1 > k || x - i - 1 > k) continue;
        ll tr = 0;
        if (c[0] <= d / 2 && d / 2 < c[i]) tr += d;
        else tr += 2 * min(c[i], d - c[i]);
        if (i < x - 1) {
            if (c[i + 1] <= d / 2 && d / 2 < c[x - 1]) tr += d;
            else tr += 2 * min(c[i + 1], d - c[i + 1]);
        }
        smin(add, tr);
    }
    return ans + add;
}

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:19:20: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   19 |     for (int i = k - 1; i < a.size(); i += k) ans += 2 * a[i];
      |                  ~~^~~
boxes.cpp:19:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |     for (int i = k - 1; i < a.size(); i += k) ans += 2 * a[i];
      |                         ~~^~~~~~~~~~
boxes.cpp:19:41: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   19 |     for (int i = k - 1; i < a.size(); i += k) ans += 2 * a[i];
      |                                       ~~^~~~
boxes.cpp:21:20: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   21 |     for (int i = k - 1; i < b.size(); i += k) ans += 2 * (d - b[i]);
      |                  ~~^~~
boxes.cpp:21:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |     for (int i = k - 1; i < b.size(); i += k) ans += 2 * (d - b[i]);
      |                         ~~^~~~~~~~~~
boxes.cpp:21:41: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   21 |     for (int i = k - 1; i < b.size(); i += k) ans += 2 * (d - b[i]);
      |                                       ~~^~~~
boxes.cpp:23:28: warning: conversion from 'long long unsigned int' to 'int' may change value [-Wconversion]
   23 |     int p = (a.size() / k) * k;
      |             ~~~~~~~~~~~~~~~^~~
boxes.cpp:24:28: warning: conversion from 'long long unsigned int' to 'int' may change value [-Wconversion]
   24 |     int q = (b.size() / k) * k;
      |             ~~~~~~~~~~~~~~~^~~
boxes.cpp:25:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |     for (int i = p; i < a.size(); i++) c.push_back(a[i]);
      |                     ~~^~~~~~~~~~
boxes.cpp:26:27: warning: conversion from 'std::vector<long long int>::size_type' {aka 'long unsigned int'} to 'int' may change value [-Wconversion]
   26 |     for (int i = b.size() - 1; i >= q; i--) c.push_back(b[i]);
      |                  ~~~~~~~~~^~~
boxes.cpp:28:19: warning: conversion from 'std::vector<long long int>::size_type' {aka 'long unsigned int'} to 'int' may change value [-Wconversion]
   28 |     int x = c.size();
      |             ~~~~~~^~

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