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  1. #pragma GCC optimize ("Ofast")
  2. #include<bits/stdc++.h>
  3. using namespace std;
  4. inline int isLeapYear(const int y){
  5.   if(y%4){
  6.     return 0;
  7.   }
  8.   if(y%100){
  9.     return 1;
  10.   }
  11.   if(y%400){
  12.     return 0;
  13.   }
  14.   return 1;
  15. }
  16. inline int numOfDaysInMonth(const int m){
  17.   if(m==2){
  18.     return 28;
  19.   }
  20.   if(m==4||m==6||m==9||m==11){
  21.     return 30;
  22.   }
  23.   return 31;
  24. }
  25. inline int numOfDaysInMonth(const int y, const int m){
  26.   if(m==2){
  27.     return numOfDaysInMonth(m)+ isLeapYear(y);
  28.   }
  29.   else{
  30.     return numOfDaysInMonth(m);
  31.   }
  32. }
  33. #define main dummy_main
  34. int main(){
  35.   return 0;
  36. }
  37. #undef main
  38. const char *s[7] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
  39. class Solution{
  40.   public:
  41.   string dayOfTheWeek(int day, int month, int year){
  42.     int Y = 1971;
  43.     int M = 1;
  44.     int D = 1;
  45.     int res = 5;
  46.     while(Y != year || M != month || D != day){
  47.       res++;
  48.       D++;
  49.       if(numOfDaysInMonth(Y,M) < D){
  50.         D = 1;
  51.         M++;
  52.       }
  53.       if(M==13){
  54.         M = 1;
  55.         Y++;
  56.       }
  57.     }
  58.     return s[res%7];
  59.   }
  60. }
  61. ;
  62. // cLay varsion 20190914-1
  63.  
  64. // --- original code ---
  65. // #define main dummy_main
  66. // {}
  67. // #undef main
  68. // 
  69. // const char *s[7] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
  70. // 
  71. // class Solution {
  72. // public:
  73. //   string dayOfTheWeek(int day, int month, int year) {
  74. //     int Y = 1971, M = 1, D = 1;
  75. //     int res = 5;
  76. // 
  77. //     while(Y != year || M != month || D != day){
  78. //       res++;
  79. //       D++;
  80. //       if(numOfDaysInMonth(Y,M) < D) D = 1, M++;
  81. //       if(M==13) M = 1, Y++;
  82. //     }
  83. // 
  84. //     return s[res%7];
  85. //   }
  86. // };
  87.  
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/8/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x20): undefined reference to `main'
collect2: error: ld returned 1 exit status
stdout
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Standard output is empty
https://ideone.com/LlOrxB
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
secret

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