#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;

}

#include<stdio.h>
#include<string.h>
int main(){
	int n;
	scanf("%d",&n);
	while(n--){
		char nstr[1000005];
		int num = 0;
		scanf("%s", nstr); 
		int len = strlen(nstr);
		for (int i = 0; i < len; i++)
		num = (num * 10 + nstr[i] - '0') % 9;
/*从高位到低位取余，
逐位计算各个位数之和及其与9的余数*/
		printf("%d\n", num%9);
		memset(nstr, 0, sizeof(nstr));
	}
	return 0;
}

#include <stdio.h>

char number[1000005];

int main()
{
    int i, n, testNum;

    scanf("%d\n", &testNum);
    while (testNum-- != 0)
    {
        scanf("%s", number);
        for (i = n = 0; number[i] != '\0'; i++)
        {
            n += number[i] - '0';
        }
        printf("%d\n", n%9);
    }
    return 0;
}