#include<stdio.h> #include<string.h> int main() { int n; char s[1000005]; scanf("%d", &n); for (int i = 0; i < n; i++) { scanf("%s", s); int la = strlen(s); for (int i = 0; i < la; i++) { s[i] = s[i] - '0'; }//将每一个字符变成数值 for (int i = 0; i < la-1; i++) { if (s[i] == 9) { s[i] = 0; } if (s[i] < 9) { s[i + 1] = (10 * s[i] + s[i + 1]) % 9; s[i]=0; }//每进进一位，取余一次 } printf("%d\n",s[la-1]); }

return 0;

}