题解（硬版）

#include<iostream>
using namespace std;
int main(){
char a;
cin >> a;
if(a == 'a' || a == 'A') cout << 1;
else if(a == 'b' || a == 'B') cout << 2;
else if(a == 'c' || a == 'C') cout << 3;
else if(a == 'd' || a == 'D') cout << 4;
else if(a == 'e' || a == 'E') cout << 5;
else if(a == 'f' || a == 'F') cout << 6;
else if(a == 'g' || a == 'G') cout << 7;
else if(a == 'h' || a == 'H') cout << 8;
else if(a == 'i' || a == 'I') cout << 9;
else if(a == 'j' || a == 'J') cout << 10;
else if(a == 'k' || a == 'K') cout << 11;
else if(a == 'l' || a == 'L') cout << 12;
else if(a == 'm' || a == 'M') cout << 13;
else if(a == 'n' || a == 'N') cout << 14;
else if(a == 'o' || a == 'O') cout << 15;
else if(a == 'p' || a == 'P') cout << 16;
else if(a == 'q' || a == 'Q') cout << 17;
else if(a == 'r' || a == 'R') cout << 18;
else if(a == 's' || a == 'S') cout << 19;
else if(a == 't' || a == 'T') cout << 20;
else if(a == 'u' || a == 'U') cout << 21;
else if(a == 'v' || a == 'V') cout << 22;
else if(a == 'w' || a == 'W') cout << 23;
else if(a == 'x' || a == 'X') cout << 24;
else if(a == 'y' || a == 'Y') cout << 25;
else if(a == 'z' || a == 'Z') cout << 26;
return 0;
}