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Apr 12th, 2020
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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. int N, A;
  6. cin >> N >> A;
  7.  
  8. // ここにプログラムを追記
  9. for (int i = 0; i < N; i++) {
  10. int B;
  11. string op;
  12. cin >> B >> op;
  13.  
  14. if (op == "+") {
  15. A += B;
  16. }
  17.  
  18. else if (op == "-") {
  19. A -= B;
  20. }
  21.  
  22. else if (op == "*") {
  23. A *= B;
  24. }
  25.  
  26. else if (op == "/" && B != 0) {
  27. A /= B;
  28. }
  29.  
  30. else {
  31. cout << "error" << endl;
  32. break;
  33. }
  34.  
  35. cout << i + 1 << ":" << A << endl;
  36. }
  37. }
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