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//Title of this code
//gcc 4.8.2

#include  <stdio.h>

short esArrayOrdenado(long d, long a[d]);
short esMatrizOrdenada(long F, long C, long m[F][C]);

int main(void)
{
    long v[10] = {5, 4, 5, 2, 1};
    long m[4][3] = {{1, 2, 3},{3, 1, 5},{5, 6, 7},{7, 8, 9}};
    
    if(esArrayOrdenado(10, v))
    {
        printf("Vector SÍ ORDENADO\n\n");
    }
    else
    {
        printf("Vector NO ORDENADO\n\n");
    }
    if(esMatrizOrdenada(4, 3, m))
    {
        printf("Matriz SÍ ORDENADA\n\n");
    }
    else
    {
        printf("Matriz NO ORDENADA\n\n");
    }
    
    
    return 0;
}

short esArrayOrdenado(long d, long a[d])
{
    long i;
    for(i = 0 ; i < d - 1 ; i++)
    {
        if(a[i] > a[i + 1]) 
        {
            return 0;
        }
    }
    return 1;
}

short esMatrizOrdenada(long F, long C, long m[F][C])
{
    long i, d = F * C;
    for(i = 0 ; i < d - 1 ; i++)
    {
        if(m[i / C][i % C] > m[(i + 1) / C][(i + 1) % C])
        {
            return 0;
        }
    }
    return 1;
}

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Compilation time: 0.13 sec, absolute running time: 0.14 sec, cpu time: 0 sec, memory peak: 3 Mb, absolute service time: 0.28 sec