Submission #26809

#	Time	Username	Problem	Language	Result	Execution time	Memory
26809		sutekine	Pancake (NOI12_pancake)	C++11	12 / 25	6 ms	2256 KiB

pancake

#include <cstdio>
#include <algorithm>
#include <iostream>
#include <queue>
#include <vector>
#include <map>
#define oo 987654321
using namespace std;

int T, n, a[10100], b[10001];
bool cmp(int x, int y){ return x > y; }
void flip(int x)
{
    for(int i = x ; i < n+x-i-1 ; i++ )
        swap(a[i], a[n+x-i-1]);
}
int main()
{
    ios::sync_with_stdio(false);
    cin>>T;
    while( T-- )
    {
        int cnt = 0;
        cin>>n;
        for(int i = 0 ; i < n ; i++ ) cin>>a[i], b[i] = a[i];
        sort(b, b+n, cmp);
        for(int i = 0 ; i < n ; i++ )
        {
            if( b[i] == a[i] ) continue;
            if( b[i] == a[n-1] ) flip(i), cnt++;
            else
            {
                int v;
                for(int j = i ; j < n ; j++ ) if( a[j] == b[i] ){ v = j; break; }
                flip(v), flip(i), cnt+=2;
            }
        }
        cout<<cnt<<" ";
    }
    return 0;
}

Compilation message (stderr)

pancake.cpp: In function 'int main()':
pancake.cpp:33:21: warning: 'v' may be used uninitialized in this function [-Wmaybe-uninitialized]
                 int v;
                     ^

• Subtask 1: 4 / 4
• Subtask 2: 4 / 4
• Subtask 3: 4 / 4
• Subtask 4: 0 / 8
• Subtask 5: 0 / 5