
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Given $c>0$. Let proposition $p$: the function $y=c^x$ is a decreasing function, and proposition $q$: for $x\in \mathbb{R}$, the inequality $f(x)=x+c>0$ always holds. If either $p$ or $q$ is true, but not both, find the range of values for $c$.

Present the answer in LaTex format: \boxed{Your answer}
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