c044: 10008 - What's Cryptanalysis

#include <bits/stdc++.h>

using namespace std;

struct box {

    char c;

    int time;

};

bool comp(box a ,box b){

    if(a.time>b.time) return true;

    else if ((a.time==b.time)&&(a.c<b.c)) return true;

    else return false;

}

int main(){

    int n;  cin>>n;

    box b[26];

    for(int i=0;i<26;i++)b[i].time=0;

    for(int i=0;i<26;i++) b[i].c=char(i+65);

    cin.ignore();

    while(n--){

        string s;

        getline(cin,s);

        for(int i=0;i<s.length();i++)

            if(isalpha(s[i]))

                b[toupper(s[i])-'A'].time++;

    }

    sort(b,b+26,comp);

    for(int i=0;i<26;i++)

        if(b[i].time>0)

            cout<<b[i].c<<" "<<b[i].time<<endl;

}