osisp_laba_1

#include <stdio.h>
#include <string.h>

#define DEBUG

int countDays(int year, int month, int day) {
    return year * 365 + month * 30 + day;
}

int getMiddleDigits(long long int num) {
    char sNum[25];
    sprintf(sNum, "%lld", num);

    int startPos = (int)(strlen(sNum) / 2) - 1;
    char sAns[4];
    sprintf(sAns, "%c%c%c", sNum[startPos], sNum[startPos + 1], sNum[startPos + 2]);
    int ans;
    sscanf(sAns, "%d", &ans);
    return ans;
}

int main(int argc, unsigned char* argv[]) {
    int k;
    sscanf(argv[4], "%d", &k);

    #ifdef DEBUG
        printf("k = %d\n", k);
    #endif

    unsigned long long sum = 0;
    for (int i = 1; i < 4; i++)
    {
        for (int j = 0; j < strlen(argv[i]); j += 2)
        {
            unsigned long long temp = (argv[i][j] << 8) + argv[i][j + 1];
            //printf("%llx\n", temp);
            sum += temp * temp;
        }
    }


    #ifdef DEBUG
        printf("sum = %lld\n", sum);
    #endif

    int day, month, year;
    sscanf(argv[5], "%d.%d.%d", &day, &month, &year);

    int days = countDays(year, month, day);

    #ifdef DEBUG
        printf("days = %d\n", days);
    #endif

    long long int s = (long long)sum * (long long)days;

    #ifdef DEBUG
        printf("s = %lld\n", s);
    #endif

    int s1 = getMiddleDigits(s);

    #ifdef DEBUG
        printf("s1 = %d\n", s1);
    #endif

    int n = s1 % k + 1;

    printf("Answer: %d\n", n);

    return 0;
}