baekjun 1874. 스택 순열

 cout << "soicem" << endl;

=> cout << "soicem" << "\n";

#include <iostream>
#include <vector>
 
using namespace std;
 
int main() {
    int n;
    cin >> n;
    int val = 1;
    vector<int> stk;
    vector<char> pm;
    int sp = -1; 
    for (int i = 1; i <= n; i++) {
        int target;
        cin >> target;
        while ((sp == -1 || target > stk[sp]) && n >= val) {
            stk.push_back(val++);
            pm.push_back('+');
            sp++;
        }
        if (target == stk[sp]) {
            stk.pop_back();
            pm.push_back('-');
            sp--;
        } else {
            cout << "NO";
            //system("pause");
            return 0;
        }
    }
    for (int i = 0; i < pm.size(); i++) 
        cout << pm[i] << '\n';
    return 0;
}