50048. Count the days

#include "count_day.h"

int is_leap(int year){
    return (year % 400 == 0) || ((year % 4 == 0) && (year % 100 != 0));
}

void count_day(int year, int day, int month, int results[7]){
    int days[] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
    if(is_leap(year)) days[2] = 29;
    for(int i = 1; i < month; i++){
        day += days[i];
    }
    day %= 7;

    for(int i = 0; i < days[month]; i++){
        results[(day + i) % 7]++;
    }
}