#include <bits/stdc++.h>

using namespace std;

int main()
{
    string s;
    int pe = 0;
    while(getline(cin, s)) {
        for (int i = 0; i < s.length(); i++) {
            if (s[i] == '.' || s[i] == '!' || s[i] == '?' || (s[i] == '-' && i )) {
                pe = 0;
            }
            if ((s[i] - '0' + '0' >= 65 && s[i] - '0' + '0' <= 90) && pe != 0) {
                s[i] = s[i] - '0' + 32 + '0';
            }
            if (pe == 0 && s[i] != ' ' && s[i] != '.' && s[i] != '!' && s[i] != '?' && s[i] != '-') {
                if (s[i] - '0' + '0' > 90) {
                    s[i] = s[i] - '0' - 32 + '0';
                }
                pe = 1;
            }
        }
        cout << s << '\n';
    }
}

Edited by author 16.08.2018 18:05

Edited by author 16.08.2018 18:05

Ohhhhh..... I find my wrong...

-HI
- HI

WA:

-Hi
- Hi

AC:

-Hi
- hi