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class Solution {
public:
 
    // counting number of substrings that have atleast one char ch
    // total substrings - count of substrings with no char as ch
    long long int count(string st,char ch){ 
 
        long long int len=st.length();
        long long int res=0;
        long long int cnt=0;
        for(long int i=0;i<len;i++){
 
            if(st[i]==ch){
                res+=((cnt)*(cnt+1))/2;
                cnt=0;
            }
 
            else
                cnt++;
        }
 
        res+=((cnt)*(cnt+1))/2;
        return (len*(len+1))/2 - res;
    }
 
    long long appealSum(string st) {
 
        long long int total_cnt=0;
        for(char ch='a';ch<='z';ch++)
            total_cnt+=count(st,ch);
 
        return total_cnt;
    }
};

Main.java:2: error: illegal start of type
public:
      ^
Main.java:6: error: <identifier> expected
    long long int count(string st,char ch){ 
        ^
Main.java:6: error: <identifier> expected
    long long int count(string st,char ch){ 
             ^
Main.java:8: error: not a statement
        long long int len=st.length();
        ^
Main.java:8: error: ';' expected
        long long int len=st.length();
            ^
Main.java:8: error: not a statement
        long long int len=st.length();
             ^
Main.java:8: error: ';' expected
        long long int len=st.length();
                 ^
Main.java:9: error: not a statement
        long long int res=0;
        ^
Main.java:9: error: ';' expected
        long long int res=0;
            ^
Main.java:9: error: not a statement
        long long int res=0;
             ^
Main.java:9: error: ';' expected
        long long int res=0;
                 ^
Main.java:10: error: not a statement
        long long int cnt=0;
        ^
Main.java:10: error: ';' expected
        long long int cnt=0;
            ^
Main.java:10: error: not a statement
        long long int cnt=0;
             ^
Main.java:10: error: ';' expected
        long long int cnt=0;
                 ^
Main.java:11: error: not a statement
        for(long int i=0;i<len;i++){
            ^
Main.java:11: error: ';' expected
        for(long int i=0;i<len;i++){
                ^
Main.java:11: error: '.class' expected
        for(long int i=0;i<len;i++){
                     ^
Main.java:11: error: ')' expected
        for(long int i=0;i<len;i++){
                        ^
Main.java:11: error: > expected
        for(long int i=0;i<len;i++){
                              ^
Main.java:11: error: not a statement
        for(long int i=0;i<len;i++){
                          ^
Main.java:11: error: ';' expected
        for(long int i=0;i<len;i++){
                                  ^
Main.java:26: error: <identifier> expected
    long long appealSum(string st) {
        ^
Main.java:28: error: not a statement
        long long int total_cnt=0;
        ^
Main.java:28: error: ';' expected
        long long int total_cnt=0;
            ^
Main.java:28: error: not a statement
        long long int total_cnt=0;
             ^
Main.java:28: error: ';' expected
        long long int total_cnt=0;
                 ^
27 errors

Standard output is empty