#include <stdio.h>
#include <stdlib.h>

typedef struct Elmnt
{
    double dbl;
    int d;
    int ind;
} Elmnt;

int
cmp(const void *first_val, const void *second_val)
{
    Elmnt *a = (Elmnt *) first_val;
    Elmnt *b = (Elmnt *) second_val;
    int res = (a->dbl < b->dbl) ? -1 : 1;
    return a->dbl != b->dbl ? res : a->ind - b->ind;
}

int
main(void)
{
    int sz_current = 1;
    Elmnt *arr = malloc(sz_current * sizeof(Elmnt));
    if (arr == NULL) {
        exit(EXIT_FAILURE);
    }


    int pos = 0;

    while (scanf("%lf%d", &arr[pos].dbl, &arr[pos].d) == 2) {
        arr[pos].ind = pos;

        if (++pos == sz_current) {
            arr = realloc(arr, 2 * sz_current * sizeof(Elmnt));
            sz_current *= 2;
        }
    }

    qsort(arr, pos, sizeof(arr[0]), cmp);

    for (int it = 0; it < pos; ++it) {
        printf("%.10g %d\n", arr[it].dbl, arr[it].d);
    }
    return 0;
}