42 lines
1.1 KiB
C++
42 lines
1.1 KiB
C++
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#include <bits/stdc++.h>
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using namespace std;
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const int N = 10010;
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int a[N];
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int st[N];
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int n, w;
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int main() {
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cin >> n;
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for (int i = 1; i <= n; i++) cin >> a[i];
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cin >> w;
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if (n % w) {
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cout << "false" << endl;
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return 0;
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}
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sort(a + 1, a + 1 + n);
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for (int i = 1; i <= n; i++) {
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if (!st[i]) {
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st[i] = 1;
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int start = i + 1;
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int target = a[i] + 1;
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for (int j = 1; j < w; j++) {
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bool flag = false;
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for (int k = start; k <= n; k++) {
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if (!st[k] && a[k] == target) {
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st[k] = 1;
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flag = true;
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start = k + 1;
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target++;
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break;
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}
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}
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if (!flag) {
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cout << "false" << endl;
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return 0;
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}
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}
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}
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}
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cout << "true" << endl;
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return 0;
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}
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