#include <stdio.h> int main( ) { int a, b, i, tot, c1, c2; scanf("%d %d", &a, &b); tot = 0; for (i = a; i <= b; i++) { c1 = i / 10; c2 = i % 10; if ((c1 + c2) % 3 == 0) tot++; } printf("%d\n", tot); return 0; }
输入:7 31
输出:_____1____ 这道题你会答吗?花几分钟告诉大家答案吧!