/***************************** ****************************** [OrHy3]: Enter a date in DD MM YYYY format ****************************** *****************************/ #include using namespace std; int main() { int dd; int mm; int yyyy; cin >> dd; cin >> mm; cin >> yyyy; int sd = 1; int sm = 1; int sy = 2000; int wd = 6; int id; int iy; int mv; bool by = 0; bool err = 0; if (yyyy < sy) { iy = sy - yyyy; } if (yyyy > sy) { iy = yyyy - sy; } if ((iy % 4) == 0) { by = 1; } switch (mm) { case 1: mv = 31; break; case 2: mv = 28; if (by == 1) { mv++; } break; case 3: mv = 31; break; case 4: mv = 30; break; case 5: mv = 31; break; case 6: mv = 30; break; case 7: mv = 31; break; case 8: mv = 31; break; case 9: mv = 30; break; case 10: mv = 31; break; case 11: mv = 30; break; case 12: mv = 31; break; default: err = 1; } if (dd > mv || dd < 1) { err = 1; } if (err == 1) { cout << "You entered an invalid format! Please retry"; } else { if (yyyy < sy) { id = iy * 365 + iy / 4; wd -= id; while (wd < 1) { wd += 7; } } if (yyyy > sy) { id = iy * 365 + iy / 4; wd += id; wd++; if (by == 1 && mm < 3) { wd--; } while (wd < 1) { wd -= 7; } } id = 0; switch (mm) { case 12: id += 30; case 11: id += 31; case 10: id += 30; case 9: id += 31; case 8: id += 31; case 7: id += 30; case 6: id += 31; case 5: id += 30; case 4: id += 31; case 3: id += 28; if (by == 1) { id++; } case 2: id += 31; } id += --dd; wd += id; if (yyyy > 2000 && by == 1 && mm > 2) { wd--; } while (wd > 7) { wd -= 7; } dd++; cout << "The " << dd << "/" << mm << "/" << yyyy << " was/is/will be "; switch (wd) { case 1: cout << "Monday"; break; case 2: cout << "Tuesday"; break; case 3: cout << "Wednesday"; break; case 4: cout << "Thursday"; break; case 5: cout << "Friday"; break; case 6: cout << "Saturday"; break; case 7: cout << "Sunday"; break; } } return 0; }

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