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#include <bits/stdc++.h>
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using namespace std;
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/*
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从前往后依次处理每一项，依次考虑符号、系数、x、x的次数：
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1、如果系数是0，则直接continue；
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2、如果不是第一个非零项，且系数是正的，则输出'+'；如果系数是负的，则无条件输出'-'；
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3、如果系数的绝对值不是1，或者是常数项，则输出系数的绝对值；
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4、如果次数不为0，则输出x
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5、如果次数大于1，则输出次数
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*/
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int main() {
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int n;
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cin >> n; // 一元多项式的次数
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bool is_first = true;
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for (int i = n; i >= 0; i--) { // 其中第 i 个整数表示第 n−i+1 次项的系数
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int a;
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cin >> a;
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if (!a) continue;
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if (!is_first && a > 0)
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printf("+");
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else if (a < 0)
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printf("-");
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if (abs(a) != 1 || i == 0) printf("%d", abs(a));
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if (i) printf("x");
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if (i > 1) printf("^%d", i);
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is_first = false;
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}
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return 0;
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}
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