亲爱的, 我正在尝试创建NewIntVar,其下限等于int64的上限:
(-9.223.372.036.854.775.808至+9.223.372.036.854.775.807)
但是当我尝试求解模型时,出现模型无效错误。我发现可以工作的最大范围(手动尝试)是以下模型.NewIntVar(-93.372.036.854.775.808,9.123.372.036.854.775.807,'pippo')
您知道为什么不支持int64吗?
谢谢 斯特凡诺
答案 0 :(得分:2)
从源代码中,我看到:
https://github.com/google/or-tools/blob/stable/ortools/sat/cp_model_checker.cc#L90
const int64 ub = proto.domain(proto.domain_size() - 1);
if (lb < kint64min + 2 || ub > kint64max - 1) {
return absl::StrCat(
"var #", v, " domain do not fall in [kint64min + 2, kint64max - 1]. ",
ProtobufShortDebugString(proto));
}
// We do compute ub - lb in some place in the code and do not want to deal
// with overflow everywhere. This seems like a reasonable precondition anyway.
if (lb < 0 && lb + kint64max < ub) {
return absl::StrCat(
"var #", v,
" has a domain that is too large, i.e. |UB - LB| overflow an int64: ",
ProtobufShortDebugString(proto));
}
所以这些值实际上是:
max-min不能超过kint64max
(9223372036854775807)
您可以改用INT32_MAX和INT32_MIN或满足这些条件的范围。