/* -*- coding: utf-8 -*-
 *
 * 3308.cc:  No.3308 One-time Changed Formula - yukicoder
 */

#include<cstdio>
#include<algorithm>

using namespace std;

/* constant */

const int MAX_N = 250000;

/* typedef */

/* global variables */

char s[MAX_N + 4];

/* subroutines */

/* main */

int main() {
  int tn;
  scanf("%d", &tn);

  while (tn--) {
    int n;
    scanf("%d%s", &n, s);

    int sum = 0;
    for (int i = 0, sgn = 1; i < n; i++) {
      if (s[i] >= '1' && s[i] <= '9') {
	if (sgn > 0) sum += '9' - s[i];
	else sum += s[i] - '1';
      }
      else {
	if (sgn > 0) sum += 9;
      }

      if (s[i] == '+') sgn = 1;
      else if (s[i] == '-') sgn = -1;
    }

    printf("%d\n", sum);
  }

  return 0;
}