Submission #775908

#	Time	Username	Problem	Language	Result	Execution time	Memory
775908		peteza	Ancient Books (IOI17_books)	C++14	12 / 100	1 ms	312 KiB

books

#include <bits/stdc++.h>
#include "books.h"
using namespace std;

int qs[1000005];
long long minimum_walk(std::vector<int> p, int s) {
    int cur = 0, cv = 0;
    long long cans = 0;
    for(int i=0;i<p.size();i++) {
        qs[min(i, p[i])]++; qs[max(i, p[i])]--;
    }
    for(int i=0;i<p.size();i++) {
        if(qs[i] && !cv) cur = i;
        cv += qs[i];
        //cout << qs[i] << ' ';
        cans += cv;
    }
	return cans + 2*cur;
}

Compilation message (stderr)

books.cpp: In function 'long long int minimum_walk(std::vector<int>, int)':
books.cpp:9:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 |     for(int i=0;i<p.size();i++) {
      |                 ~^~~~~~~~~
books.cpp:12:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |     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