Use -BigInt(1) instead of BigInt("-1") to avoid the parsing overhead.

Instead just call the u64bit constructor and invert using the BigInt
operator.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/ressol.cpp b/src/ressol.cpp
index ab4ad7876..0cd2b988a 100644
--- a/src/ressol.cpp
+++ b/src/ressol.cpp
@@ -27,7 +27,7 @@ BigInt ressol(const BigInt& a, const BigInt& p)
       return a;
 
    if(jacobi(a, p) != 1) // not a quadratic residue
-      return BigInt("-1");
+      return -BigInt(1);
 
    if(p % 4 == 3)
       return power_mod(a, ((p+1) >> 2), p);
@@ -67,7 +67,7 @@ BigInt ressol(const BigInt& a, const BigInt& p)
       u32bit t = s;
 
       if(t <= i)
-         return BigInt("-1");
+         return -BigInt(1);
 
       c = power_mod(c, BigInt(BigInt::Power2, t-i-1), p);
       r = mod_p.multiply(r, c);