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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. bool isLeap(int y) {
  5.     return (y % 4 == 0 && y % 100 != 0) || (y % 400 == 0);
  6. }
  7.  
  8. int daysInMonth(int m, int y) {
  9.     int d[] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
  10.     if (m == 2 && isLeap(y)) return 29;
  11.     return d[m];
  12. }
  13.  
  14. int main() {
  15.     int d, m, y, k;
  16.     cin >> d >> m >> y >> k;
  17.  
  18.     int numDays = daysInMonth(m, y);
  19.  
  20.     int thu1 = ((k - (d - 1)) % 7 + 7) % 7;
  21.     if (thu1 == 0) thu1 = 7;
  22.  
  23.     int thuCuoi = (thu1 + numDays - 1) % 7;
  24.     if (thuCuoi == 0) thuCuoi = 7;
  25.  
  26.     int thuHaiDau = 0;
  27.     for (int i = 1, t = thu1; i <= numDays; ++i, t = t % 7 + 1) {
  28.         if (t == 2) {
  29.             thuHaiDau = i;
  30.             break;
  31.         }
  32.     }
  33.  
  34.     int chuNhatCuoi = 0;
  35.     for (int i = 1, t = thu1; i <= numDays; ++i, t = t % 7 + 1) {
  36.         if (t == 8) chuNhatCuoi = i;
  37.     }
  38.  
  39.     cout << numDays << endl;
  40.     cout << thuHaiDau << endl;
  41.     cout << chuNhatCuoi << endl;
  42.     cout << thu1 << endl;
  43.     cout << thuCuoi << endl;
  44.  
  45.     return 0;
  46. }
  47.  
Success #stdin #stdout 0.01s 5320KB
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stdin
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8 3 2024 6
stdout
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31
4
0
6
1
https://ideone.com/gLqeR8
language:
C++ (gcc 8.3)
created:
10 hours ago
visibility:
public

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