func_code_string: #include <bits/stdc++.h>   using namespace std;   int l[100005], r[100005];   int main(int argc, char* argv[]) {     std::ios::sync_with_stdio(false);     int n, k;     scanf( %d%d , &n, &k);     int sum = 0;     for (int i = 0; i < n; i++) {       scanf( %d%d , &l[i], &r[i]);       sum += r[i] - l[i] + 1;     }     int res = 0;     while (sum % k != 0) {       sum++;       res++;     }     printf( %d n , res);     return 0;   }   