Algorithm/add-oil/main.cc

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C++
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#include <iostream>
#include <cstring>
#include <algorithm>
using namespace std;
int main() {
int num = 0;
string str;
cin >> str;
if (atoi(str[0]) > 2) {
num++;
}
bool is_feb = atoi(str[1]) == 2;
int days = stoi(str[3].to_string()+str[4].to_string());
if (days > 30 || (is_feb && days > 28)) {
num++;
}
cout << num << endl;
}