void RankingTable<Element>::erase(Element e) {
try {
eraseByRank(getRankOf(e));
} catch (int exception) {
return;
}
}
uint RankingTable<Element>::getHits(Element e) const {
uint rank = getRankOf(e);
return hits.at(rank);
}
/* BEGIN TEMPLATE */
void solve() {
/* BEGIN SOLUTION */
/* cruft to search for an instance exercising all transformations */
int doneA=0;
int doneB=0;
int doneC=0;
int doneD=0;
int doneE=0;
int doneF=0;
int doneG=0;
int doneH=0;
int* origSizes = (int*)malloc(sizeof(int)*getStackSize());
int i;
for (i=0;i<getStackSize();i++)
origSizes[i] = getPancakeRadius(i);
/* end of this cruft */
int stackSize = getStackSize();
if (debug>0) {
printf("{\n");
int rank;
for (rank=0; rank < stackSize; rank++){
printf("%d\n",getPancakeRadius(rank));
}
printf("}\n");
}
while (1) {
int tRadius = getPancakeRadius(0);
int posTPlus = getRankOf(tRadius+1); // returns -99 if non-existent, that is then ignored
int posTMinus = getRankOf(tRadius-1);
int posT = 0;
if (debug>1) {
printf("t Radius: %d\n",tRadius);
int rank;
for (rank=0; rank < stackSize; rank++) {
printf("[%d]=%d; ",rank,getPancakeRadius(rank));
if (isFree(rank))
printf("free;");
else
printf("NON-free;");
if (isFirst(rank))
printf("first; ");
else
printf("NON-first; ");
if (isLast(rank))
printf("last; ");
else
printf("NON-last; ");
if (rank == posTPlus)
printf("t+1; ");
if (rank == posTMinus)
printf("t-1; ");
if (rank == posT)
printf("t;" );
printf("\n");
}
}
if (isFree(posT)) {
if (isFree(posTPlus)) { /* CASE A: t and t+o free */
if (debug>0)
printf("Case A+\n");
flip(posTPlus);
doneA = 1;
} else if (isFree(posTMinus)) { /* CASE A: t and t-o free */
if (debug>0)
printf("Case A-\n");
flip(posTMinus);
doneA = 1;
} else if (isFirst(posTPlus)) { /* CASE B: t free, t+o first element */
if (debug>0)
printf("Case B+\n");
flip(posTPlus);
doneB = 1;
} else if (isFirst(posTMinus)) { /* CASE B: t free, t-o first element */
if (debug>0)
printf("Case B-\n");
flip(posTMinus);
doneB = 1;
} else if (min(posTPlus,posTMinus) != -99) { /* CASE C: t free, but both t+o and t-o are last elements */
if (debug>0)
printf("Case C\n");
flip(min(posTPlus,posTMinus) );
flip(min(posTPlus,posTMinus) - 1);
flip(max(posTPlus,posTMinus) + 1);
flip(min(posTPlus,posTMinus) - 1);
doneC = 1;
} else {
if (debug>0)
printf("Case Cbis\n");
flip(max(posTPlus,posTMinus) + 1);
flip(max(posTPlus,posTMinus) );
doneC = 1;
}
} else { // t is in a block
if (blockLength() == stackSize) { // Done!
if (tRadius != 1) // all reverse
flip(stackSize);
if (doneA && doneB && doneC && doneD && doneE && doneF && doneG && doneH && wasRandom()) {
printf("BINGO! This instance is VERY interesting as it experiences every cases of the algorithm.\nPLEASE REPORT IT. PLEASE DONT LOSE IT.\n");
printf("{\n");
int rank;
for (rank=0; rank < stackSize; rank++)
printf("%d, ",origSizes[rank]);
printf("}\n");
}
free(origSizes);
return;
}
if (isFree(posTPlus)) { /* CASE D: t in a block, t+1 free */
if (debug>0)
printf("Case D+\n");
flip(posTPlus);
doneD = 1;
} else if (isFree(posTMinus)) { /* CASE D: t in a block, t-1 free */
if (debug>0)
printf("Case D-\n");
flip(posTMinus);
doneD = 1;
} else if (isFirst(posTPlus)) { /* CASE E: t in a block, t+1 first element */
if (debug>0)
printf("Case E+\n");
flip(posTPlus);
doneE = 1;
} else if (isFirst(posTMinus)) { /* CASE E: t in a block, t-1 first element */
if (debug>0)
printf("Case E-\n");
flip(posTMinus);
doneE = 1;
} else if (isLast(posTPlus) && posTPlus != 1) { /* CASE F+: t in a block, t+1 last element */
doneF = 1;
if (debug>0)
printf("Case F+\n");
flip(blockLength());
flip(posTPlus + 1);
int newPos = getRankOf(tRadius);
if (newPos>0)
flip(newPos);
} else if (isLast(posTMinus) && posTMinus != 1) { /* CASE F-: t in a block, t-1 last element */
doneF = 1;
if (debug>0)
printf("Case F-\n");
flip(blockLength());
flip(posTMinus + 1);
int newPos = getRankOf(tRadius);
if (newPos>0)
flip(newPos);
} else {
int k = blockLength()-1;
int o = getPancakeRadius(1) - tRadius;
int pos = getRankOf(tRadius+(k+1)*o);
if (isFree(pos) || isFirst(pos)) {
doneG = 1;
if (debug>0)
printf("Case G\n");
flip(k+1);
flip(pos);
} else {
doneH = 1;
if (debug>0)
printf("Case H\n");
flip(pos+1);
flip(getRankOf(tRadius+k*o));
}
}
}
}
free(origSizes);
/* END SOLUTION */
}