백준 2010

#include <stdio.h>

int main(void)

{

int N, num, com;

scanf("%d", &N);

int connect = 0;

//if (N > 500000 || N<0) return 0;

for (int i = 0; i < N; i++)

{

scanf("%d", &num);

//if (arr[i]>1000) return 0;

connect += num;

}

printf("%d\n", connect-N+1);

return 0;

}