45 lines
1.2 KiB
C++
45 lines
1.2 KiB
C++
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#include <bits/stdc++.h>
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using namespace std;
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const int f[10] = {0, -1, 1, 7, 4, 2, 6, 8, 10};
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int T, n, d, i;
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int main() {
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for (cin >> T; T--;) {
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cin >> n;
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if (n <= 8)
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cout << f[n];
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else {
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d = n % 7;
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if (!d)
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for (i = 1; i <= n / 7; i++) cout << 8;
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if (d == 1) {
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cout << 10;
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for (i = 1; i < n / 7; i++) cout << 8;
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}
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if (d == 2) {
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cout << 1;
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for (i = 1; i <= n / 7; i++) cout << 8;
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}
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if (d == 3) {
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if (n == 10)
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cout << 22;
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else {
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cout << 200;
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for (i = 1; i <= n / 7 - 2; i++) cout << 8;
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}
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}
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if (d == 4) {
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cout << 20;
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for (i = 1; i < n / 7; i++) cout << 8;
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}
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if (d == 5) {
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cout << 2;
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for (i = 1; i <= n / 7; i++) cout << 8;
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}
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if (d == 6) {
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cout << 6;
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for (i = 1; i <= n / 7; i++) cout << 8;
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}
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}
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cout << '\n';
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}
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}
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