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#include <bits/stdc++.h>
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using namespace std;
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int main() {
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ios::sync_with_stdio(false); //读入输出优化的强迫症
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map<char, int> _map;//表示以char类型为下标，存储的是int
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_map['a'] = 1;
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_map['b'] = 2;
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_map['c'] = 3;
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_map['d'] = 1;
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_map['e'] = 2;
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_map['f'] = 3;
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_map['g'] = 1;
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_map['h'] = 2;
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_map['i'] = 3;
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_map['j'] = 1;
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_map['k'] = 2;
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_map['l'] = 3;
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_map['m'] = 1;
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_map['n'] = 2;
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_map['o'] = 3;
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_map['p'] = 1;
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_map['q'] = 2;
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_map['r'] = 3;
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_map['s'] = 4;
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_map['t'] = 1;
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_map['u'] = 2;
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_map['v'] = 3;
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_map['w'] = 1;
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_map['x'] = 2;
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_map['y'] = 3;
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_map['z'] = 4;
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_map[' '] = 1;
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string str = "";
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//输入一个字符串
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getline(cin, str);
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int l = 0;
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for (int i = 0; i < str.length(); i++) {
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l += _map[str[i]];
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}
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cout << l << endl;
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return 0;
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}
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