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USACO Section 2.2 Preface Numbering
/* ID: lucien23 PROG: preface LANG: C++ */ #include <iostream> #include <fstream> #include <string> #include <map> using namespace std; int main() { ifstream infile("preface.in"); ofstream outfile("preface.out"); if(!infile || !outfile) { cout << "file operation failure!" << endl; return -1; } int N; infile >> N; map<int, string> romans; romans.insert(pair<int, string>(1, "I")); romans.insert(pair<int, string>(2, "II")); romans.insert(pair<int, string>(3, "III")); romans.insert(pair<int, string>(4, "IV")); romans.insert(pair<int, string>(5, "V")); romans.insert(pair<int, string>(6, "VI")); romans.insert(pair<int, string>(7, "VII")); romans.insert(pair<int, string>(8, "VIII")); romans.insert(pair<int, string>(9, "IX")); romans.insert(pair<int, string>(10, "X")); romans.insert(pair<int, string>(20, "XX")); romans.insert(pair<int, string>(30, "XXX")); romans.insert(pair<int, string>(40, "XL")); romans.insert(pair<int, string>(50, "L")); romans.insert(pair<int, string>(60, "LX")); romans.insert(pair<int, string>(70, "LXX")); romans.insert(pair<int, string>(80, "LXXX")); romans.insert(pair<int, string>(90, "XC")); romans.insert(pair<int, string>(100, "C")); romans.insert(pair<int, string>(200, "CC")); romans.insert(pair<int, string>(300, "CCC")); romans.insert(pair<int, string>(400, "CD")); romans.insert(pair<int, string>(500, "D")); romans.insert(pair<int, string>(600, "DC")); romans.insert(pair<int, string>(700, "DCC")); romans.insert(pair<int, string>(800, "DCCC")); romans.insert(pair<int, string>(900, "CM")); romans.insert(pair<int, string>(1000, "M")); romans.insert(pair<int, string>(2000, "MM")); romans.insert(pair<int, string>(3000, "MMM")); map<char, int> letters; letters['I'] = 0; letters['V'] = 0; letters['X'] = 0; letters['L'] = 0; letters['C'] = 0; letters['D'] = 0; letters['M'] = 0; string strBase = "IVXLCDM"; for (int i=1; i<=N; i++) { int temp = i; string str = ""; if (temp >= 1000) { str += romans.at(temp / 1000 * 1000); temp %= 1000; } if (temp >= 100) { str += romans.at(temp / 100 * 100); temp %= 100; } if (temp >= 10) { str += romans.at(temp / 10 * 10); temp %= 10; } if (temp >= 1) { str += romans.at(temp); } int len = str.size(); for (int j=0; j<len; j++) { int count = letters.at(str[j]); letters[str[j]] = count + 1; } } int len = strBase.size(); for (int i=0; i<len; i++) { int count = letters.at(strBase[i]); if (count > 0) { outfile << strBase[i] << " " << count << endl; } } return 0; }
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