UVa : 11683 (Laser Sculpture)



// http://uva.onlinejudge.org/external/116/11683.html
// Runtime: 0.020s
// Tag: Adhoc, Stack 

/* 
 * File:   main.cpp
 * Author: shahab
 * Created on April 15, 2011, 12:20 AM
 */

// @BEGIN_OF_SOURCE_CODE

#include <iostream>
#include <cstdio>
#include <algorithm>
#include <cstring>
#include <string>
#include <cctype>
#include <stack>
#include <queue>
#include <list>
#include <vector>
#include <map>
#include <sstream>
#include <cmath>
#include <bitset>
#include <utility>
#include <set>
#include <numeric>

#define INF_MAX 2147483647
#define INF_MIN -2147483647
#define pi acos(-1.0)
#define N 1000000
#define LL long long

#define For(i, a, b) for( int i = (a); i < (b); i++ )
#define Fors(i, sz) for( size_t i = 0; i < sz.size (); i++ )
#define Fore(it, x) for(typeof (x.begin()) it = x.begin(); it != x.end (); it++)
#define Set(a, s) memset(a, s, sizeof (a))
#define Read(r) freopen(r, "r", stdin)
#define Write(w) freopen(w, "w", stdout)

using namespace std;

int matrix [10000 + 5] [10000 + 5];

int main(int argc, char** argv)
{
    int a, c;

    while ( scanf ("%d %d", &a, &c) ) {
        if ( a == 0 && c == 0 ) break;

        stack <int> s;
        int num, cnt = 0;
        scanf ("%d", &num);
        s.push(num);

        for ( int i = 1; i < c; i++ ) {
            scanf ("%d", &num);
            if ( num == s.top() ) continue;
            else if ( num < s.top() ) {
                s.pop();
                s.push(num);
            }
            else {
                cnt += (num - s.top());
                s.pop();
                s.push(num);
            }
        }

        cnt += (a - s.top());
        printf ("%d\n", cnt);

    }

    return 0;
}

// @END_OF_SOURCE_CODE
Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s