USACO FEB07LEVEL1 Problem 'rowcol' Analysis

by Rob Kolstad

This is no more than a matrix transpose. Read in one order (e.g., by rows) and then output in the other (e.g., by columns):

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

int main() {
    FILE *fin = fopen ("rowcol.in", "r");
    FILE *fout = fopen ("rowcol.out", "w");
    int r, c, i, j;
    int x[20][20];
    fscanf (fin, "%d %d", &r, &c);
    for (i = 0; i < c; i++)
        for (j = 0; j < r; j++)
            fscanf (fin, "%d", &x[j][i]);
    for (j = 0; j < r; j++)
        for (i = 0; i < c; i++)
            fprintf(fout, "%d\n", x[j][i]);
    exit (0);
}