#include <iostream> #include <cstring> #include <stdexcept> #include <cassert> class BinExpr { const unsigned int _bufferSize; char *_buffer; char *_dataBegin; char *_dataEnd; unsigned int _value; unsigned int _units; bool _hasPlus; void _prepend(char c) { if (_buffer == _dataBegin) throw std::overflow_error("No space at beginning of buffer"); *_dataBegin = c; --_dataBegin; } void _append(char c) { if (_buffer + _bufferSize - 1 == _dataEnd) throw std::overflow_error("No space at end of buffer"); *_dataEnd = c; ++_dataEnd; } public: BinExpr(unsigned int buffer_size): _bufferSize(buffer_size) { _buffer = new char [buffer_size]; clear(); } ~BinExpr() { delete [] _buffer; } BinExpr(const BinExpr &other) = delete; void clear() { std::memset(_buffer, 0, _bufferSize); _dataBegin = _buffer + _bufferSize / 2; _dataEnd = _dataBegin + 1; _hasPlus = false; _units = 0; _value = 0; } const char *data() const { return _dataBegin + 1; } void inc() { if (_dataBegin + 1 == _dataEnd) { _append('1'); } else { _append('+'); _append('1'); _hasPlus = true; } _value += 1; _units += 1; } void dbl() { if (_value == 0) return; if (_hasPlus) { _prepend('('); _append(')'); _hasPlus = false; } _prepend('*'); _prepend(')'); _prepend('1'); _prepend('+'); _prepend('1'); _prepend('('); _units += 2; _value *= 2; } unsigned int countUnits() const { return _units; } unsigned int value() const { return _value; } }; void BuildValueExpression(const unsigned int value, BinExpr &buffer) { buffer.clear(); for (unsigned int mask = 1 << (sizeof(value) * 8 - 1); mask != 0; mask >>= 1) { buffer.dbl(); if ((mask & value) != 0) buffer.inc(); } } int main() { BinExpr buffer(1024); unsigned int t; std::cin >> t; for (unsigned int i = 0; i < t; ++i) { unsigned int ki; std::cin >> ki; BuildValueExpression(ki, buffer); if (buffer.value() == ki && buffer.countUnits() <= 100) std::cout << buffer.data() << "\n"; else std::cout << "NIE\n"; } return 0; }
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 | #include <iostream> #include <cstring> #include <stdexcept> #include <cassert> class BinExpr { const unsigned int _bufferSize; char *_buffer; char *_dataBegin; char *_dataEnd; unsigned int _value; unsigned int _units; bool _hasPlus; void _prepend(char c) { if (_buffer == _dataBegin) throw std::overflow_error("No space at beginning of buffer"); *_dataBegin = c; --_dataBegin; } void _append(char c) { if (_buffer + _bufferSize - 1 == _dataEnd) throw std::overflow_error("No space at end of buffer"); *_dataEnd = c; ++_dataEnd; } public: BinExpr(unsigned int buffer_size): _bufferSize(buffer_size) { _buffer = new char [buffer_size]; clear(); } ~BinExpr() { delete [] _buffer; } BinExpr(const BinExpr &other) = delete; void clear() { std::memset(_buffer, 0, _bufferSize); _dataBegin = _buffer + _bufferSize / 2; _dataEnd = _dataBegin + 1; _hasPlus = false; _units = 0; _value = 0; } const char *data() const { return _dataBegin + 1; } void inc() { if (_dataBegin + 1 == _dataEnd) { _append('1'); } else { _append('+'); _append('1'); _hasPlus = true; } _value += 1; _units += 1; } void dbl() { if (_value == 0) return; if (_hasPlus) { _prepend('('); _append(')'); _hasPlus = false; } _prepend('*'); _prepend(')'); _prepend('1'); _prepend('+'); _prepend('1'); _prepend('('); _units += 2; _value *= 2; } unsigned int countUnits() const { return _units; } unsigned int value() const { return _value; } }; void BuildValueExpression(const unsigned int value, BinExpr &buffer) { buffer.clear(); for (unsigned int mask = 1 << (sizeof(value) * 8 - 1); mask != 0; mask >>= 1) { buffer.dbl(); if ((mask & value) != 0) buffer.inc(); } } int main() { BinExpr buffer(1024); unsigned int t; std::cin >> t; for (unsigned int i = 0; i < t; ++i) { unsigned int ki; std::cin >> ki; BuildValueExpression(ki, buffer); if (buffer.value() == ki && buffer.countUnits() <= 100) std::cout << buffer.data() << "\n"; else std::cout << "NIE\n"; } return 0; } |