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- #include <bits/stdc++.h>
- using namespace std;
- int main() {
- int N, A;
- cin >> N >> A;
- // ここにプログラムを追記
- for (int i = 0; i < N; i++) {
- int B;
- string op;
- cin >> B >> op;
- if (op == "+") {
- A += B;
- }
- else if (op == "-") {
- A -= B;
- }
- else if (op == "*") {
- A *= B;
- }
- else if (op == "/" && B != 0) {
- A /= B;
- }
- else {
- cout << "error" << endl;
- break;
- }
- cout << i + 1 << ":" << A << endl;
- }
- }
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