제출 #899318

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
899318		aykhn	선물상자 (IOI15_boxes)	C++17	100 / 100	515 ms	372872 KiB

boxes

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

using namespace std;

long long delivery(int N, int K, int L, int P[]) {
    vector<long long> v;
    v.push_back(0);
    for (long long i = (P[0] == 0); i < N; i++) v.push_back(P[i]);
    long long p[N + 5], s[N + 5];
    p[0] = 0;
    for (long long i = 1; i < v.size(); i++) p[i] = p[max(0LL, i - K)] + v[i] * 2;
    s[v.size()] = 0;
    for (long long i = (long long)v.size() - 1; i >= 0; i--) s[i] = s[min((long long)v.size(), i + K)] + 2 * (L - v[i]);
    long long res = min(p[(long long)v.size() - 1], s[0]);
    if (K >= N) res = min(res, (long long)L);
    for (long long i = 0; i < v.size(); i++)
    {
        res = min(res, p[i] + s[i + 1]);
        res = min(res, p[i] + s[min((long long)v.size(), i + K + 1)] + L);
    }
    return res;
}

컴파일 시 표준 에러 (stderr) 메시지

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:12:29: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |     for (long long i = 1; i < v.size(); i++) p[i] = p[max(0LL, i - K)] + v[i] * 2;
      |                           ~~^~~~~~~~~~
boxes.cpp:17:29: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |     for (long long i = 0; i < v.size(); i++)
      |                           ~~^~~~~~~~~~

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