看输出格式里有说本题使用 SPJ，会不会是标签忘记加了。恳请管理大大查看一下。

如果尚未有 spj 程序，我也有写一份 spj。不介意的话麻烦加到题目中吧。

#include "testlib.h"

std::string inS, ouS, anS;

inline bool checkFormat() {
  int n = (int) ouS.size(), m = inS.size();
  if (n > 3000) return false;
  if (n < m) return false;
  for (int i = 0; i < n; ++i) {
    if (ouS[i] >= '0' && ouS[i] <= '9') continue;
    if (ouS[i] == '+' || ouS[i] == '=') continue;
    return false;
  }
  if (ouS[0] == '+') return false;
  if (ouS[n - 1] == '+') return false;
  for (int i = 1; i < n; ++i)
    if (ouS[i] == '+' && ouS[i] == ouS[i - 1]) return false;
  int j = 0;
  for (int i = 0; i < n; ++i) {
    if (ouS[i] == '+') continue;
    if (j >= m) return false;
    if (ouS[i] != inS[j]) return false;
    j++;
  }
  if (j != m) return false;
  return true;
}

inline bool checkMinimum() {
  int cnt1 = 0, cnt2 = 0;
  for (int i = 0; i < (int) ouS.size(); ++i)
    if (ouS[i] == '+') cnt1++;
  for (int i = 0; i < (int) anS.size(); ++i)
    if (anS[i] == '+') cnt2++;
  return cnt1 == cnt2;
}

inline int getValue(int l, int r) {
  if (l + 4 <= r) return -999999999;
  int x = 0;
  for (int i = l; i <= r; ++i)
    x = x * 10 + ouS[i] - '0';
  return x;
}

inline bool checkSum() {
  long long s = 0, b = 0;
  int n = (int) ouS.size();
  for (int i = n - 1; i >= 0; --i) {
    if (ouS[i] == '=') {
      b = getValue(i + 1, n - 1);
      break;
    }
  }
  int pre = -1;
  for (int i = 0; i < n; ++i) {
    if (ouS[i] == '+' || ouS[i] == '=') {
      s += getValue(pre + 1, i - 1);
      pre = i;
      if (ouS[i] == '=') break;
    }
  }
  return s == b;
}

int main(int argc, char *argv[]) {
  registerTestlibCmd(argc, argv);
  inS = inf.readToken();
  ouS = ouf.readToken();
  anS = ans.readToken();
  if (checkFormat() == false) quitf(_wa, "Wrong Answer[1]");
  if (checkMinimum() == false) quitf(_wa, "Wrong Answer[2]");
  if (checkSum() == false) quitf(_wa, "Wrong Answer[3]");
  quitf(_ok, "Accepted");
  return 0;
}