72 lines
1.4 KiB
C++
72 lines
1.4 KiB
C++
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#include <bits/stdc++.h>
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using namespace std;
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/**
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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2
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3 5
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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4
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*/
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const int N = 30;
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int f[N]; //<2F><>ʾ<EFBFBD>ճ<EFBFBD>j<EFBFBD><6A><EFBFBD><EFBFBD><EFBFBD>ӵķ<D3B5><C4B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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int a[N]; //ÿ<>ֹ<EFBFBD><D6B9><EFBFBD><EFBFBD>а<EFBFBD><D0B0>ӵ<EFBFBD><D3B5><EFBFBD><EFBFBD><EFBFBD>
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int ans; //<2F><>װ<EFBFBD><D7B0><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>İ<EFBFBD><C4B0>Ӹ<EFBFBD><D3B8><EFBFBD>
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//<2F><><EFBFBD><EFBFBD>
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bool isHz(int a, int b) {
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for (int i = 2; i <= min(a, b); i++) //a,b<><62><EFBFBD>ܴ<EFBFBD><DCB4>ڵĹ<DAB5><C4B9><EFBFBD><EFBFBD><EFBFBD>
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if (a % i == 0 && b % i == 0)
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return false;
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return true;
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}
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int main() {
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int n;
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cin >> n;
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for (int i = 1; i <= n; i++)
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cin >> a[i];
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//<2F><><EFBFBD><EFBFBD>
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sort(a + 1, a + 1 + n);
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//a<><61><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><D0A3>Dz<EFBFBD><C7B2>Ǵ<EFBFBD><C7B4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʵ<EFBFBD><CAB5><EFBFBD>
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bool flag = false;
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int mx;//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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for (int i = 1; i <= n; i++) {
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for (int j = i + 1; j <= n; j++)
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if (isHz(a[i], a[j])) {
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flag = true;
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mx = a[i] * a[j] - a[i] - a[j];
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break;
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}
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if (flag)
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break;
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}
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if (!flag) {
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cout << -1 << endl;
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return 0;
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}
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/**
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<EFBFBD><EFBFBD>ȫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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f[j]<EFBFBD><EFBFBD>ʾ<EFBFBD>ճ<EFBFBD>j<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӵķ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>f[j]>0<EFBFBD>ʹյó<EFBFBD><EFBFBD><EFBFBD>f[j]=0<EFBFBD>ʹղ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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*/
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f[0] = 1; // 0<><30><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>״̬<D7B4>ǺϷ<C7BA><CFB7>ģ<EFBFBD><C4A3>ǿ<EFBFBD><C7BF>Ե<EFBFBD><D4B5><EFBFBD><EFBFBD><EFBFBD>״̬<D7B4><CCAC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֻ<EFBFBD><D6BB><EFBFBD><EFBFBD>һ<EFBFBD>ַ<EFBFBD><D6B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Dz<EFBFBD><C7B2><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֹ<EFBFBD><D6B9><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD>Ų<EFBFBD>Ҫ
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for (int i = 1; i <= n; i++)
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for (int j = 1; j <= mx; j++)
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if (j >= a[i] && f[j - a[i]])//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>װ<EFBFBD>£<EFBFBD><C2A3><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><C7B0><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɴ<C9B4><EFA3AC><EFBFBD><EFBFBD>ǰ<EFBFBD><C7B0><EFBFBD>Լ<EFBFBD><D4BC><EFBFBD><EFBFBD>ƽ<EFBFBD>
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f[j]++;
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//ö<><C3B6>ÿ<EFBFBD><C3BF><EFBFBD><EFBFBD><EFBFBD>ܵ<EFBFBD><DCB5><EFBFBD><EFBFBD>֣<EFBFBD><D6A3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><D6B4><EFBFBD>1<EFBFBD><31><EFBFBD><EFBFBD><EFBFBD>ϵķ<CFB5><C4B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǿ<EFBFBD><C7BF>Դճ<D4B4><D5B3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><DEB7>ճ<EFBFBD>
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for (int i = 1; i <= mx; i++)
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if (!f[i])
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ans++;
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//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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cout << ans << endl;
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return 0;
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}
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