| unBitSet | Math.BitSet |
| undefMCF | Data.Graph.MinCostFlow |
| undefMF | Data.Graph.MaxFlow |
| undefPI | Data.Pool |
| undefSI | |
| 1 (Function) | Data.SplayMap |
| 2 (Function) | Data.SplaySeq.Raw |
| unDigits | Math.Digits |
| unDigitsU | Math.DigitsVector |
| uniformRSt | Heuristic.Randoms |
| unifyMUF | Data.UnionFind.Mutable |
| unifyMUF_ | Data.UnionFind.Mutable |
| unifyPUF | Data.UnionFind.Potencial |
| unifyPUF_ | Data.UnionFind.Potencial |
| unifySUF | Data.UnionFind.Sparse |
| unIM | Data.IntervalMap |
| Unindex | Data.Utils.Unindex |
| unindex | Data.Utils.Unindex |
| unIndexMap | Data.BinaryLifting |
| unIndexMapWithAction | Data.BinaryLifting |
| unitMat | Math.Matrix |
| unlinesBSB | ToyLib.ShowBSB, ToyLib.Contest.Prelude |
| unMat2x2 | Data.Instances.Affine2d |
| unModInt | Data.ModInt |
| unPermutation | Data.BinaryLifting |
| unsafeAssocsHM | Data.DenseHashMap |
| unsafeDeleteBH | Data.BinaryHeap |
| unsafeDeleteBH_ | Data.BinaryHeap |
| unsafeExchangeBack | Data.Buffer |
| unsafeExchangeFront | Data.Buffer |
| unsafeExchangeIV | Data.Vector.IxVector, ToyLib.Contest.Grid |
| unsafeFreezeBH | Data.BinaryHeap |
| unsafeFreezeBuffer | Data.Buffer |
| unsafeFreezeInternalBuffer | Data.Buffer |
| unsafeFreezeIV | Data.Vector.IxVector, ToyLib.Contest.Grid |
| unsafeFreezeLeavesSTree | Data.SegmentTree.Strict |
| unsafeFreezeMSV | Data.MultiSetVec |
| unsafeIKthMaxRWM | Data.WaveletMatrix.Raw |
| unsafeIKthMaxWM | Data.WaveletMatrix |
| unsafeIKthMinRWM | Data.WaveletMatrix.Raw |
| unsafeIKthMinWM | Data.WaveletMatrix |
| unsafeKeysDIM | Data.DenseIntMap |
| unsafeKeysDIS | Data.DenseIntSet |
| unsafeKthMaxRWM | Data.WaveletMatrix.Raw |
| unsafeKthMaxWM | Data.WaveletMatrix |
| unsafeKthMinRWM | Data.WaveletMatrix.Raw |
| unsafeKthMinWM | Data.WaveletMatrix |
| unsafeModifyBack | Data.Buffer |
| unsafeModifyFront | Data.Buffer |
| unsafeModifyIV | Data.Vector.IxVector, ToyLib.Contest.Grid |
| unsafeModifyMBack | Data.Buffer |
| unsafeModifyMFront | Data.Buffer |
| unsafeModifyMIV | Data.Vector.IxVector, ToyLib.Contest.Grid |
| unsafeReadIV | Data.Vector.IxVector, ToyLib.Contest.Grid |
| unsafeSwapBack | Data.Buffer |
| unsafeSwapFront | Data.Buffer |
| unsafeSwapIV | Data.Vector.IxVector, ToyLib.Contest.Grid |
| unsafeThawIV | Data.Vector.IxVector, ToyLib.Contest.Grid |
| unsafeViewBH | Data.BinaryHeap |
| unsafeWriteBack | Data.Buffer |
| unsafeWriteFront | Data.Buffer |
| unsafeWriteIV | Data.Vector.IxVector, ToyLib.Contest.Grid |
| unSegmentTree | Data.SegmentTree.Strict |
| unV2 | Data.Instances.Affine2d |
| unwordsBSB | ToyLib.ShowBSB, ToyLib.Contest.Prelude |
| updateNodeRSS | Data.SplaySeq.Raw |
| usedHM | Data.DenseHashMap |