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22 lines
513 B
C++
22 lines
513 B
C++
#define _CRT_SECURE_NO_WARNINGS
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#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
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#include <bits/stdc++.h>
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using namespace std;
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using ll = long long;
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ll qpow(ll a, ll b, ll m)
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{
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ll r = 1;
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for (; b; b >>= 1, a = a * a % m)
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if (b & 1)
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r = r * a % m;
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return r;
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}
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int main()
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{
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int T, n;
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scanf("%d", &T);
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for (int t = 1; t <= T; t++)
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scanf("%d", &n), printf("Case #%d: %lld\n", t, n * qpow(2, n - 1, 1000000007) % 1000000007);
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return 0;
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}
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