func_code_string: #include <bits/stdc++.h>   using namespace std;   void getint(int &v) {     char ch, fu = 0;     for (ch =  * ; (ch <  0  || ch >  9 ) && ch !=  - ; ch = getchar())       ;     if (ch ==  - ) fu = 1, ch = getchar();     for (v = 0; ch >=  0  && ch <=  9 ; ch = getchar()) v = v * 10 + ch -  0 ;     if (fu) v = -v;   }   int main() {     int maxmax = 0, max, x, sum = 0, n, m;     long long int sumsum = 0;     getint(n);     if (n == 1) printf( %d n , 0), exit(0);     for (int i = 0; i < n; ++i) {       getint(m);       max = 0;       for (int j = 0; j < m; ++j) {         getint(x);         if (x > max) max = x;       }       sumsum += (long long)max * m;       sum += m;       if (max > maxmax) maxmax = max;     }     printf( %lld n , (long long)sum * (long long)maxmax - sumsum);   }   