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a guest Jul 23rd, 2011 134 Never
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  1. void solve() throws IOException {
  2.         int n = readInt();
  3.         int[] a = new int[n];
  4.         int s = 0;
  5.         for (int i = 0; i < n; i++) {
  6.                 a[i] = readInt();
  7.                 s += a[i];
  8.         }
  9.         if (s % n != 0) {
  10.                 out.println("Unrecoverable configuration.");
  11.                 return;
  12.         }
  13.         int mid = s / n;
  14.         int dif = 0;
  15.         for (int i = 0; i < n; i++) {
  16.                 if (a[i] != mid) dif++;
  17.         }
  18.         if (dif == 0) {
  19.                 out.println("Exemplary pages.");
  20.                 return;
  21.         }
  22.         if (dif != 2) {
  23.                 out.println("Unrecoverable configuration.");
  24.                 return;
  25.         }
  26.         int from = -1, to = -1, vol = -1;
  27.         for (int i = 0; i < n; i++) {
  28.                 if (a[i] != mid) {
  29.                         if (a[i] < mid) {
  30.                                 from = i+1;
  31.                                 vol = mid - a[i];
  32.                         } else {
  33.                                 to = i+1;
  34.                         }
  35.                 }
  36.         }
  37.         out.printf("%d ml. from cup #%d to cup #%d.\n", vol, from, to);
  38. }
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