第二题好像只要判断两种情况：最后是 +2 的或者最后是 +1+1的..我这么写就 AC 了 #include <iostream> using namespace std; int main(void) {     int max, A, B, C, diff;     cin >> A >> B >> C;     max = A;     if (B > max) max = B;     if (C > max) max = C;     diff = max * 3 - A - B - C;     if (diff % 2 == 1) cout << (diff + 3) / 2;     else cout << diff / 2;     return 0; } //别问我为什么选 Java 岗写 C++ 代码...