1.c

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

int main(int argc, char** argv)
{
    long long sum = 0;
    for(int i = 1; i < argc-4; i++)
        for(int j = 0; j < strlen(argv[i]); j++)
            sum += (argv[i][j] * argv[i][j]);
    sum *= atoi(argv[argc-3]) + atoi(argv[argc-2])*30 + atoi(argv[argc-1])*365;
    char sh[20];
    sprintf(sh, "%lld", sum);
    int ind = strlen(sh)/2;
    char s1[4];
    s1[0] = sh[ind-1];
    s1[1] = sh[ind];
    s1[2] = sh[ind+1];
    s1[3] = '\0';
    int N = atoi(s1) % atoi(argv[argc-4]) + 1;
    printf("Your task num: %d\n", N);
    return 0;
}