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zoj 1169 Square Cipher

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zoj 1169 Square Cipher

#include<cstdio>#include<cstring>#include<vector>#include<map>using namespace std;int main(){char key[100], s[100], c[5][5];bool flag[26];vector<char> v;vector<char> res;map<char, pair<int, int> > mp;while (gets(key), strcmp("999", key)){gets(s);for (int i = 0; key[i] != ''; i++)if (key[i] == 'J')key[i] = 'I';for (int i = 0; s[i] != ''; i++)if (s[i] == 'J')s[i] = 'I';memset(flag, 0, sizeof(flag));flag['J' - 'A'] = true;v.clear();res.clear();mp.clear();for (int i = 0; key[i] != ''; i++)if (!flag[key[i] - 'A']){flag[key[i] - 'A'] = true;v.push_back(key[i]);}for (int i = 0; i < 26; i++)if (!flag[i])v.push_back('A' + i);for (int i = 0; i < 5; i++)for (int j = 0; j < 5; j++){c[i][j] = v[i * 5 + j];mp[v[i * 5 + j]] = make_pair(i, j);}for (int i = 0; s[i] != ''; i++){if (s[i] == ' ')continue;if (!res.empty() && res.back() == s[i])res.push_back(s[i] == 'Q' ? 'Z' : 'Q');res.push_back(s[i]);}if (res.size() % 2)res.push_back(res.back() == 'Q' ? 'Z' : 'Q');int r1, c1, r2, c2;char ch1, ch2;for (size_t i = 0; i < res.size(); i += 2){r1 = mp[res[i]].first;c1 = mp[res[i]].second;r2 = mp[res[i + 1]].first;c2 = mp[res[i + 1]].second;if (c1 == c2){ch1 = c[(r1 + 1) % 5][c1];ch2 = c[(r2 + 1) % 5][c2];}else if (r1 == r2){ch1 = c[r1][(c1 + 1) % 5];ch2 = c[r2][(c2 + 1) % 5];}else{ch1 = c[r1][c2];ch2 = c[r2][c1];}printf(i ? " %c%c" : "%c%c", ch1, ch2);}puts("");}return 0;}
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