View Compilation Error

0_0_38737586_32020.cpp: In function 'void solve()':
0_0_38737586_32020.cpp:76:22: error: 'i' was not declared in this scope
   76 |                 if(s[i] == a) cnt ++;
      |                      ^
0_0_38737586_32020.cpp:77:22: error: 'i' was not declared in this scope
   77 |                 if(s[i] == b) cnt ++;
      |                      ^
0_0_38737586_32020.cpp:78:22: error: 'i' was not declared in this scope
   78 |                 if(s[i] == c) cnt ++;
      |                      ^