12 lines
264 B
C++
12 lines
264 B
C++
pll diophantos(ll a, ll b) {
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assert(a>0 and b>=0);
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if(b == 0) return {1, 0};
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auto [y, x] = diophantos(b, a%b); y = y-(a/b)*x;
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if(x < 0 or x >= b) {
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ll t = x/b;
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if(x%b < 0) t--;
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x -= b*t; y += a*t;
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}
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return {x, y};
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} |