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#include <bits/stdc++.h> using namespace std; int month[15]; void updateLeapYear(int year) { if(year % 400 == 0) { month[2] = 29; // #1 : change 28 to 29 } else if(year % 100 == 0) { month[2] = 28; // #2 : change 29 to 28 } else if(year % 4 == 0) { month[2] = 29; } else { month[2] = 28; } } void storeMonth() { month[1] = 31; month[2] = 28; month[3] = 31; month[4] = 30; month[5] = 31; month[6] = 30; month[7] = 31; month[8] = 31; month[9] = 30; month[10] = 31; month[11] = 30; month[12] = 31; } int findLuckyDates(int d1, int m1, int y1, int d2, int m2, int y2) { storeMonth(); int result = 0; while(true) { int x = d1; x = x * 100 + m1; x = x * 10000 + y1; // #3 : change 1000 to 10000 if(x % 4 == 0 || x % 7 == 0) { // #4 : change && to || result = result + 1; } if(d1 == d2 && m1 == m2 && y1 == y2) { break; } updateLeapYear(y1); d1 = d1 + 1; if(d1 > month[m1]) { m1 = m1 + 1; d1 = 1; if(m1 > 12) { y1 = y1 + 1; m1 = 1; // #5 : change m1+1 to 1 } } } return result; } int main() { string str; int d1, m1, y1, d2, m2, y2; getline(cin, str); for(int i = 0; i < str.size(); i++) { if(str[i] == '-') { str[i] = ' '; } } stringstream ss; ss << str; ss >> d1 >> m1 >> y1 >> d2 >> m2 >> y2; int result = findLuckyDates(d1, m1, y1, d2, m2, y2); cout << result << endl; }
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Prime Dates
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