【題解】ZeroJudge c014: 10035 – Primary Arithmetic

#include <iostream>
using namespace std;

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n1, n2;
    while (cin >> n1 >> n2){
        int carry = 0, cnt = 0;
        if (n1 == 0 && n2 == 0) break;
        while (n1 > 0 || n2 > 0){
            int tmp = n1 % 10 + n2 % 10 + carry;
            if (tmp >= 10){
                carry = tmp / 10;
                cnt++;
            } else {
                carry = 0;
            }
            n1 /= 10;
            n2 /= 10;
        }
        if (cnt == 0) cout << "No carry operation.\n";
        else if (cnt == 1) cout << "1 carry operation.\n";
        else cout << cnt << " carry operations.\n";
    }
    return 0;
}

while True:
    n1, n2 = map(str, input().split())
    if n1 == '0' and n2 == '0':
        break

    n1 = n1[::-1]
    n2 = n2[::-1]

    if len(n1) < len(n2):
        n1, n2 = n2, n1

    ans = 0
    carry = 0
    for i in range(len(n1)):
        tmp = carry + int(n1[i])
        if i < len(n2):
            tmp += int(n2[i])
        if tmp >= 10:
            ans += 1
        carry = tmp // 10

    if ans == 0:
        print("No carry operation.")
    elif ans == 1:
        print("1 carry operation.")
    else:
        print(f"{ans} carry operations.")