제출 #228023

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
228023		AaronNaidu	Ancient Books (IOI17_books)	C++14	12 / 100	6 ms	384 KiB

books

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

int pos[300000];

ll minimum_walk(vector<int> p, int s) {
    int trueLength = p.size();
    for (int i = 0; i < p.size(); i++)
    {
        pos[p[i]] = i;
    }
    
    for (int i = p.size() - 1; i >= 0; i--)
    {
        if (p[i] == i)
        {
            trueLength--;
        }
        else
        {
            break;
        }
    }
    ll toRet = 0;
    int startPoint = 0;
    int maxSoFar = -1;
    for (int i = 0; i < trueLength; i++)
    {
        maxSoFar = max(maxSoFar, p[i]);
        if (maxSoFar == i)
        {
           // cout << "Breaking at " << i << "\n";
            for (int j = startPoint+1; j <= i; j++)
            {
               // cout << "Adding " << abs(j - p[j]) << " for " << j << "\n";
                toRet += abs(j - p[j]);
            }
            if (i < trueLength - 1)
            {
                //cout << "Adding " << abs(pos[startPoint] - (i+1)) << " for travelling\n";
                toRet += abs(pos[startPoint] - (i+1));
                startPoint = i+1;
            }
            else
            {
                toRet += abs(startPoint - p[startPoint]);
            }
            
        }
    }
    //cout << "Adding " << startPoint << " at end\n";
    toRet += startPoint;
    return toRet;
}

컴파일 시 표준 에러 (stderr) 메시지

books.cpp: In function 'll minimum_walk(std::vector<int>, int)':
books.cpp:9:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < p.size(); i++)
                     ~~^~~~~~~~~~

• Subtask 1: 12 / 12
• Subtask 2: 0 / 10
• Subtask 3: 0 / 28
• Subtask 4: 0 / 20
• Subtask 5: 0 / 30