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36 lines
1.1 KiB
C++
36 lines
1.1 KiB
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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#define CRP(t, x) const t &x
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#define OPL(t, x) bool operator<(CRP(t, x)) const
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#define FIL(x, v) memset(x, v, sizeof(x))
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#define CLR(x) FIL(x, 0)
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#define NE1(x) FIL(x, -1)
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#define INF(x) FIL(x, 0x3f)
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#ifndef _DEBUG
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#define _DEBUG 0
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#endif // !_DEBUG
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#define IFD if (_DEBUG)
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typedef long long ll, i64;
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int main()
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{
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int T;
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scanf("%d", &T);
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ll b, c, p = 1e9 + 7;
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while (T--)
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{
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scanf("%lld%lld", &b, &c);
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bool flag = true;
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for (ll i = 0; i < 10000000 && flag; i++)
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if ((b * b - 4 * c - i * i) % (4 * p) == 0)
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if ((b + i) & 1 ^ 1)
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printf("%lld %lld\n", (b - i) >> 1, (b + i) >> 1), flag = false;
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for (ll i = 0; i < 10000000 && flag; i++)
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if (((p + b) * (p + b) - 4 * c) % (4 * p) == 0)
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if ((p + b + i) & 1 ^ 1)
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printf("%lld %lld\n", (p + b - i) >> 1, (p + b + i) >> 1), flag = false;
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if (flag) puts("-1 -1");
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}
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return 0;
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} |