In Python 3.0:
N = int(input())
M = int(input())
result = N*(M+1)
print(result)
#It produces runtime error


In C:
#include <stdio.h>

int main(void) {
  short int n, k;

  scanf("%4hd%4hd", &n, &k);
  printf("%hd\n", n * (k+1));
  return 0;
}
# It produces wrong answer for test N7

SHORT_MAX, probably, is 32767.
Replace short with long or long long.

Edited by author 26.11.2013 10:16

 scanf("%4hd%4hd", &n, &k); /// you dont need this

 scanf("%i %i", &n, &k); // like this