?? 2304.cpp
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/* This Code is Submitted by wywcgs for Problem 2304 on 2006-08-02 at 22:09:47 */
#include <cstdio>
#include <algorithm>
using namespace std;
const int N = 1024;
int main()
{
int i, j, n, fc[N], nc[N];
while(scanf("%d", &n) != EOF && n != 0) {
for(i = 0; i < n; i++) scanf("%d", &fc[i]);
bool can = true;
for(i = 1; i < n; i++) {
for(j = 0; j < n; j++) { scanf("%d", &nc[j]); nc[j] -= fc[j]; }
for(j = 1; j < n && can; j++)
if(nc[j] != nc[0]) can = false;
}
printf("%shomogeneous\n", can ? "" : "not ");
}
return 0;
}
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