Submission #420292

#	Time	Username	Problem	Language	Result	Execution time	Memory
420292		Andyvanh1	Ancient Books (IOI17_books)	C++14	50 / 100	164 ms	14936 KiB

books

#include <bits/stdc++.h>
#include "books.h"
 
using namespace std;
 
#define vt vector
#define INF 0x3f3f3f3f
#define pb push_back
#define all(x) (x).begin(),(x).end()
#define rep(i,x) for(int (i) = 0;(i) < (x); (i)++)
#define MOD 1000000007
 
typedef vt<int> vi;
typedef long long ll;
typedef long double ld;
typedef pair<int,int> pii;
 
ll minimum_walk(vi p, int s){
    for(int i = p.size()-1; i>=0; i--){
        if(p[i]==i)p.pop_back();
        else break;
    }
    ll ans = 0;
    int curlast = 0;
    int n = p.size();
    rep(i,n)ans+=1ll*(abs(p[i]-i));
    for(int i = 0; i < n; i++){
        if(i>curlast)ans+=2;
        curlast = max(curlast,p[i]);
    }
    return ans;
}

Compilation message (stderr)

books.cpp: In function 'll minimum_walk(vi, int)':
books.cpp:10:26: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   10 | #define rep(i,x) for(int (i) = 0;(i) < (x); (i)++)
      |                          ^
books.cpp:26:5: note: in expansion of macro 'rep'
   26 |     rep(i,n)ans+=1ll*(abs(p[i]-i));
      |     ^~~

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