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30 lines
618 B
30 lines
618 B
#include <bits/stdc++.h>
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using namespace std;
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const int N = 20;
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char s[N];
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int len;
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void dfs(int u,string t){
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if(u==len){
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cout << t << endl;
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return;
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}
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if(s[u]>='A'&&s[u]<='Z'){
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dfs(u + 1, t + s[u]);
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string tmp;
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tmp.push_back(s[u] + 32);
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dfs(u + 1, t + tmp);
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}else if(s[u]>='a'&&s[u]<='z'){
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string tmp;
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tmp.push_back(s[u] - 32);
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dfs(u + 1, t + tmp);
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dfs(u + 1, t + s[u]);
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}else
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dfs(u + 1, t + s[u]);
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}
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int main() {
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cin >> s;
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len = strlen(s);
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dfs(0, "");
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return 0;
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} |